Fits select 2021-2026 Toyota 4Runner, Land Cruiser, Sequoia, Tacoma and Lexus GX550, LX600.

The Timbren SES (Suspension Enhancement System) TORSEQ3 is engineered to provide superior load support and stability for your truck or SUV without the complexity of traditional air springs. These high-performance hollow rubber cushions absorb road shocks and automatically adjust to uneven loads or road conditions, effectively eliminating rear-end sag and vehicle squat while towing or hauling. By providing a progressive spring rate, this system significantly reduces trailer sway and improves overall handling and safety.

Designed for the DIY enthusiast, this kit features a complete bolt-on installation that uses factory mounting points—no drilling or routing of airlines is required. Because there are no fittings or moving parts to maintain, the system is entirely leak-proof and maintenance-free, offering a reliable suspension solution for the life of the vehicle.

• Eliminates vehicle squatting and sagging under heavy loads
• Hollow rubber springs provide a progressive spring rate for improved ride quality
• Reduces trailer sway and improves steering control
• No-drill, bolt-on installation using basic hand tools
• Maintenance-free design with no airlines or fittings to leak
• Manufacturer Part Number: TORSEQ3
• Includes a Lifetime Warranty

Fits 2008-2023 Toyota Sequoia (SR5, Limited, Platinum, TRD Pro, TRD Sport, Nightshade, and Capstone).

The Timbren Suspension Enhancement System (SES) replaces factory bump stops with high-performance Aeon hollow rubber springs to eliminate rear-end sag and vehicle squat under load. This kit provides a progressive spring rate, automatically adjusting to maintain a level vehicle profile and improve roll stability when towing or hauling heavy trailers. Unlike air-spring systems, the SES is maintenance-free and features a leak-proof design with no air lines or fittings required.

• Vehicle Stability: Reduces trailer sway and improves overall handling by providing additional support to the rear suspension.
• Shock Absorption: Aeon rubber cushions absorb road vibrations and harsh impacts for a more controlled ride.
• Maintenance-Free: No air lines, gauges, or compressors to monitor; designed for fit-it-and-forget-it reliability.
• Easy Installation: Bolt-on design requires only basic hand tools; no drilling or vehicle modifications necessary.
• Manufacturer Part Number: TORSEQ1
• Warranty: Lifetime Warranty included.

Fits select 1998-2024 Lexus and Toyota models, including 4Runner, Land Cruiser, FJ Cruiser, Sequoia, GS, GX, and LX.

The Timbren SES (Suspension Enhancement System) TORSEQ is engineered to eliminate vehicle squat and sagging while towing or hauling heavy loads. These progressive-rate rubber springs augment your factory suspension to provide a level ride and increased stability. Unlike air bags, this system requires no airlines, no gauges, and zero maintenance. The cushions bolt directly to factory mounting points, absorbing road shocks and automatically adjusting to uneven loads or road conditions.

• Eliminates vehicle squatting and sagging under heavy loads
• Improves overall handling and reduces trailer sway
• Maintenance-free design with no airlines or fittings to leak
• Simple bolt-on installation using basic hand tools; no drilling required
• Durable progressive-rate rubber cushions for improved ride quality
• Manufacturer Part Number: TORSEQ
• Limited Lifetime Warranty

Fits 2004-2016 Toyota Sienna models (Base, CE, L, LE, Limited, SE, XLE, and XLE Limited).

The Timbren SES (Suspension Enhancement System) kit TORSEN04 is a high-performance rear suspension upgrade designed to eliminate vehicle squatting and sagging under heavy loads. Utilizing Aeon hollow rubber springs, this system provides a progressive spring rate that automatically adjusts to uneven road conditions and trailer tongue weight, significantly reducing trailer sway and improving overall vehicle stability.

Engineered for maximum reliability, the Timbren SES kit requires zero maintenance. Unlike air spring systems, there are no air lines to route, no fittings to leak, and no compressors to fail. The system bolts directly to factory mounting points using basic hand tools, making it an ideal DIY solution for Sienna owners who frequently tow or haul gear.

• Eliminates rear-end sag and bottoming out under heavy loads
• Aeon hollow rubber springs absorb road shocks for improved ride quality
• Maintenance-free design with no air lines or gauges required
• Simple bolt-on installation; no drilling or special tools needed
• Improves steering control and braking effectiveness while loaded
• Manufacturer Part Number: TORSEN04
• Includes a lifetime warranty

Fits select 1979-2026 Toyota Tacoma, Tundra, 4Runner, Pickup, T100, Land Cruiser, and Lexus GX550/LX470 models. This Timbren Suspension Enhancement System (SES) is engineered to replace the factory bump stops on your vehicle's front suspension, providing a significantly improved ride under load and better control on uneven terrain.

The TOFTUN4 kit features high-quality hollow rubber springs that deliver a progressive spring rate. This means they remain soft during normal driving to maintain ride quality, but automatically provide more support as the suspension compresses. This system effectively eliminates front-end squatting and sagging, reduces trailer sway, and cushions road shocks to protect your vehicle's components and improve steering response.

Installation is straightforward and requires no drilling or routing of air lines. These kits are a true "set it and forget it" solution with no maintenance required, as there are no valves or fittings to leak. Every SES kit is built to withstand the harshest environments while providing a lifetime of reliable service.

• Eliminates Squat & Sagging: Maintains proper vehicle height and alignment under load.
• Maintenance-Free: No air lines, gauges, or compressors to manage.
• Progressive Rate: Rubber cushions automatically adjust to load and road conditions.
• Easy Bolt-On Install: Uses existing mounting holes; can be installed in minutes with basic hand tools.
• Durable Construction: High-performance rubber springs designed for longevity and impact absorption.
• Part Number: TOFTUN4
• Warranty: Lifetime Warranty

Fits select 1990-2024 Toyota 4Runner, Land Cruiser, FJ Cruiser, and Lexus GX460/GX470 models.

The Timbren SES (Suspension Enhancement System) TOFTAC4A is a high-performance alternative to traditional air bags, designed to replace the factory bump stops on your vehicle's front suspension. Featuring Aeon® hollow rubber springs, this kit provides a progressive spring rate that automatically adjusts to road conditions and uneven loads. By absorbing road shocks and increasing roll stability, the system effectively eliminates front-end squatting, sagging, and trailer sway.

Engineered for durability and ease of use, the SES system is maintenance-free with no air lines or fittings to leak. The bolt-on design allows for a quick installation using basic hand tools, requiring no drilling. This kit is ideal for vehicles equipped with heavy front-end accessories such as winches, bull bars, or snow plows, ensuring a level ride and improved handling under load.

• Hollow rubber springs provide a progressive rate to cushion road shocks
• Eliminates vehicle sagging and improves overall handling stability
• Maintenance-free design with no air lines or pneumatic components
• Direct bolt-on installation to factory mounting points
• Manufacturer Part Number: TOFTAC4A
• Includes all necessary mounting hardware and brackets
• Lifetime Warranty

Fits select 2000-2023 Toyota Tundra and 2005-2023 Toyota Tacoma models.

Standard Timbren SES kits are engineered for factory ride heights. When you install a suspension lift, leveling kit, or body lift, the increased distance between the frame and the rear leaf springs prevents the helper springs from engaging properly, leading to rear-end sag under load. This Timbren SES spacer kit (SPCRTORTUN4) bridges that gap, restoring the effectiveness of your helper springs for improved towing and hauling stability.

Designed specifically for lifted applications where the empty gap between the frame and leaf spring measures between 6.25 inches and 7.75 inches, this modular kit allows you to fine-tune the engagement point. The included spacers can be mixed and matched to achieve the precise ride height required for your specific lift configuration.

• Specifically engineered to work with Timbren SES kit TORTUN4
• Accommodates frame-to-leaf spring gaps of 6.25" to 7.75"
• Modular design for adjustable ride height engagement
• Includes (2) 1-inch spacers and (2) 1/2-inch spacers
• Complete with all necessary installation hardware
• Manufacturer Part Number: SPCRTORTUN4

Fits 2004-2024 Nissan Titan and 2016-2023 Nissan Titan XD models across all trims including PRO-4X, Platinum Reserve, and SV.

The Timbren Suspension Enhancement System (SES) is engineered to eliminate vehicle squat and sagging under heavy loads. By replacing the factory bump stops with high-performance hollow rubber springs, this kit provides a progressive spring rate that automatically adjusts to uneven loads and road conditions. This results in improved handling, reduced trailer sway, and a more stable ride without compromising empty ride quality.

This maintenance-free system is a reliable alternative to air bags, as it requires no air lines, compressors, or manual adjustments. The bolt-on design utilizes existing factory holes for a straightforward installation that typically takes minutes with basic hand tools. Constructed from durable natural rubber, these cushions absorb road shocks and vibrations to protect your suspension and improve overall safety while towing or hauling.

• Manufacturer Part Number: NRTTNB
• Eliminates vehicle squatting and sagging under load
• Cushions road shocks and improves stability
• Maintenance-free design with no air lines or fittings to leak
• Easy bolt-on installation; no drilling required
• Manufacturer Lifetime Warranty included

Fits 2016-2024 Nissan Titan XD models, including Platinum Reserve, PRO-4X, S, SL, and SV trims.

The Timbren SES (Suspension Enhancement System) NRTTNA is engineered to eliminate rear-end sag and improve vehicle stability under load. This kit replaces the factory bump stops with high-performance hollow rubber springs that provide a progressive spring rate. These springs automatically adjust to uneven loads or road conditions, absorbing road shocks and significantly reducing trailer sway for a more controlled driving experience.

Designed for heavy-duty performance without the complexity of air bags, this system requires no air lines, fittings, or compressors, making it a completely maintenance-free solution. The bolt-on design utilizes existing factory mounting points for a straightforward installation that requires no drilling or special tools.

• Eliminates vehicle squatting and sagging under heavy towing or hauling
• Cushions road shocks and improves overall ride quality
• Maintenance-free design with no air lines to leak or fail
• Easy bolt-on installation with basic hand tools
• High-grade hollow rubber spring construction for long-term durability
• Manufacturer Part Number: NRTTNA
• Lifetime Warranty included

Fits select 2004-2024 Nissan Titan trucks (including LE, Platinum Reserve, PRO-4X, S, SE, SL, SV, and XE models).

The Timbren NRTTN Suspension Enhancement System (SES) is designed to eliminate rear-end sag and improve vehicle handling during heavy hauling or towing. Utilizing Aeon hollow rubber springs, this kit replaces the factory bump stops to provide a progressive spring rate. These springs automatically adjust to uneven loads or road conditions, absorbing road shocks and reducing trailer sway without the complexity of air-based systems.

Built for durability and ease of use, the NRTTN kit features a maintenance-free design with no airlines to leak and no fittings to fail. The bolt-on installation requires no drilling, allowing you to upgrade your suspension with basic hand tools in a matter of minutes.

• Eliminates vehicle squatting and sagging under load
• Cushions road shocks for improved ride quality and stability
• Maintenance-free design with no airlines or compressors
• Heavy-duty rubber construction for longevity and performance
• Easy bolt-on installation using factory mounting points
• Manufacturer Part Number: NRTTN
• Lifetime Warranty

Fits 2022-2026 Nissan Frontier (PRO-4X, PRO-X, S, SL, and SV).

The Timbren SES (Suspension Enhancement System) NRFTR3 is engineered to eliminate rear-end sag and improve vehicle stability when towing or hauling heavy loads. By replacing the factory bump stops with high-performance hollow rubber cushions, this kit provides a progressive spring rate that automatically adjusts to load weight and road conditions. Unlike air spring kits, the SES system is completely maintenance-free with no airlines to route, no fittings to leak, and no manual pressure adjustments required.

• Eliminates vehicle squatting and sagging while towing or hauling.
• Hollow rubber cushions absorb road shocks and reduce trailer sway for a more controlled ride.
• Simple bolt-on installation utilizes factory mounting points with no drilling required.
• Maintenance-free design with no airlines or fittings to service.
• Constructed for durability and backed by a lifetime warranty.
• Includes all necessary mounting hardware and instructions.
• Manufacturer Part Number: NRFTR3

Fits select 2002-2023 Dodge, Freightliner, and Mercedes-Benz Sprinter 2500 models. This Timbren Suspension Enhancement System (SES) provides a maintenance-free solution for heavy-duty hauling and towing by replacing the factory bump stops with progressive-rate rubber springs.

Designed to eliminate vehicle squatting, sagging, and excessive trailer sway, the MBRSP25A kit automatically adjusts to uneven loads and road conditions. The hollow rubber cushions absorb road shocks and improve overall handling without the complexity of air lines or fittings. Installation is a straightforward bolt-on process using basic hand tools, requiring no drilling or routing of lines.

• Eliminates rear-end sag and improves vehicle stability under load
• Maintenance-free design with no air lines or gauges required
• Simple bolt-on installation using factory mounting points
• High-quality rubber spring technology since 1965
• Manufacturer Part Number: MBRSP25A
• Includes a lifetime warranty

Fits select 2002-2026 Dodge Ram Van, Freightliner Sprinter, and Mercedes-Benz Sprinter 2500/3500 models.

The Timbren Suspension Enhancement System (SES) MBFSP35 is engineered to improve vehicle stability and ride quality by replacing the factory bump stops with high-performance Aeon hollow rubber springs. This front-axle kit is designed to handle the heavy-duty requirements of van platforms, effectively eliminating vehicle squatting and sagging while providing a progressive spring rate that adjusts automatically to road conditions and cargo loads.

This system is ideal for Sprinter and Ram Van owners who experience trailer sway, instability, or excessive suspension settling. Unlike air bag systems, Timbren SES kits require zero maintenance—there are no air lines to route, no fittings to leak, and no pressure to monitor. The bolt-on design allows for a straightforward installation using basic hand tools with no drilling required.

• Eliminates front-end squat and sagging under heavy loads
• Aeon rubber springs absorb road shocks and improve overall handling
• Durable construction designed to withstand extreme temperatures and road debris
• Maintenance-free design with no air lines or compressors needed
• Simple bolt-on installation into factory mounting points
• Manufacturer Lifetime Warranty
• MPN: MBFSP35

Fits select 2007-2025 Jeep Wrangler and Wrangler JK models including Rubicon, Sahara, Sport, and Unlimited trims.

The Timbren SES (Suspension Enhancement System) JRJK is engineered to provide superior rear-load support for your Jeep Wrangler without the complexity of traditional air bags. These high-performance rubber cushions are designed to absorb road shocks and automatically adjust to uneven loads, effectively eliminating vehicle squat and sagging during towing or heavy hauling. This improves overall handling, reduces trailer sway, and ensures a more stable ride quality on and off-road.

Built for durability and ease of use, this kit features a maintenance-free design with no air lines to route or fittings to leak. The system installs in minutes using basic hand tools, bolting directly to factory mounting points without the need for drilling.

• Eliminates rear-end squatting and sagging under heavy loads
• Cushions road shocks and improves overall vehicle handling
• Maintenance-free design with no air lines or compressors required
• Simple bolt-on installation with no drilling or routing necessary
• Includes heavy-duty rubber cushions and all required mounting hardware
• Manufacturer Part Number: JRJK
• Lifetime Warranty

The Timbren SES (Suspension Enhancement System) JRC01 is engineered to improve vehicle stability and load-handling performance for select 1984-2015 Jeep and Nissan applications. By replacing the factory bump stops with high-performance hollow rubber springs, this kit provides a progressive spring rate that automatically adjusts to heavy loads or uneven road conditions. This design effectively eliminates vehicle squatting and sagging while reducing trailer sway and body roll.

Unlike traditional air bags, the Timbren SES is completely maintenance-free. There are no air lines to route, no fittings to leak, and no manual pressure adjustments required. The system installs in minutes using basic hand tools, bolting directly to existing factory mounting points with no drilling or modifications necessary.

• Manufacturer Part Number: JRC01
• Material: High-quality hollow rubber cushions
• Prevents rear-end sag under heavy loads or towing
• Improves overall handling and ride quality
• Maintenance-free design with no air lines or compressors
• Easy bolt-on installation with included hardware
• Lifetime warranty included

Fits select 1984-2015 Jeep Cherokee, Comanche, Wagoneer, Grand Wagoneer, and Nissan Xterra.

Fits select 1997-2025 Jeep Wrangler (including JK/JL) and 2020-2025 Jeep Gladiator models across all trim levels including Rubicon, Sahara, and Sport.

Upgrade your front-end stability with the Timbren SES (Suspension Enhancement System) kit. Designed to replace factory bump stops, these hollow rubber springs provide a progressive spring rate that automatically adjusts to vehicle load and road conditions. Whether you are running heavy aftermarket bumpers, winches, or snowplows, this kit eliminates vehicle squat and front-end sag while significantly reducing body roll and improving overall handling.

The JFTJ system is engineered for long-term reliability with no air lines to route and no fittings to leak. The bolt-on design allows for a straightforward installation using basic hand tools, requiring no drilling or permanent modifications to your frame. The natural rubber cushions absorb road shocks, providing a smoother ride quality without the maintenance requirements of traditional air helper springs.

• Eliminates front-end squat and sagging under heavy loads
• Improves steering control and braking stability
• Maintenance-free design with no air lines or leaks
• Easy bolt-on installation to factory mounting points
• High-performance hollow rubber springs for progressive support
• Manufacturer Part Number: JFTJ
• Lifetime Warranty included

Fits select 1996-2017 Acura MDX, Honda Odyssey, Honda Pilot, and Isuzu Oasis. This Timbren SES (Suspension Enhancement System) kit is engineered to provide additional support and stability for your vehicle's rear suspension under heavy loads. By utilizing high-performance hollow rubber springs, this system eliminates vehicle squatting and sagging while significantly reducing trailer sway and improving overall handling during towing or hauling.

The HROD2 kit features a maintenance-free design with no air lines to leak or fittings to monitor. The progressive rate of the rubber cushions allows them to automatically adjust to uneven loads or road conditions, ensuring a smooth ride whether the vehicle is loaded or empty. Installation is a straightforward, direct bolt-on process that requires no drilling and can be completed in minutes using basic hand tools.

• Specifically designed for select Acura, Honda, and Isuzu models (1996-2017)
• Eliminates rear-end sag and vehicle squatting under load
• Cushions road shocks and reduces trailer sway for improved safety
• Durable rubber spring technology with a progressive spring rate
• Easy bolt-on installation with no drilling or air lines required
• Manufacturer Part Number: HROD2
• Includes a lifetime warranty

Fits 2018-2025 Honda Odyssey Elite, EX, EX-L, LX, Sport, Sport-L, and Touring models.

The Timbren SES (Suspension Enhancement System) kit HRDD5G is engineered to solve the common issue of rear-end sag and squat in your Honda Odyssey. By replacing the OEM bump stops with high-performance hollow rubber springs, this system provides additional support for heavy cargo, passengers, and towing. The progressive rate of the rubber cushions means they automatically adjust to the load, providing a smooth ride when empty and maximum stability when loaded.

This kit is designed for a completely maintenance-free experience. Unlike air suspension systems, there are no airlines to route, no fittings to leak, and no manual pressure adjustments required. The bolt-on design utilizes factory mounting points for an installation that can be completed in minutes using basic hand tools with no drilling required.

• Eliminates vehicle squatting and sagging under heavy loads
• Improves handling and reduces trailer sway for safer towing
• Absorbs road shocks and vibrations for a more comfortable ride
• No-drill, easy bolt-on installation using factory mounting points
• Zero maintenance required—no airlines, gauges, or compressors
• Manufacturer Part Number: HRDD5G
• Includes a Lifetime Warranty

Fits select 2000-2020 Cadillac Escalade, Chevrolet Suburban, Tahoe, Avalanche, and GMC Yukon / Yukon XL models.

The Timbren SES (Suspension Enhancement System) GMRYS4 is a high-performance rear suspension upgrade engineered to eliminate vehicle squat and sagging under heavy loads. Utilizing proprietary rubber cushions, this system automatically adjusts to uneven loads and road conditions, ensuring a level ride and significantly improved handling whether you are towing a trailer or hauling heavy cargo. These kits are designed to replace the factory bump stops to provide additional support and stability.

Built for long-term reliability, the SES kit is completely maintenance-free. Unlike air-ride systems, there are no airlines to route, no fittings to leak, and no compressors to fail. The simple bolt-on design allows for a quick installation using basic hand tools, requiring no drilling into the vehicle frame.

• Eliminates vehicle squatting and sagging under load for a level ride height
• Cushions road shocks and reduces trailer sway for improved safety
• Simple bolt-on installation with no drilling or airlines required
• Progressive-rate rubber springs adjust automatically to load weight
• Maintenance-free design with no moving parts to service
• Manufacturer Part Number: GMRYS4
• Includes a lifetime warranty

Fits select 2011-2026 Chevrolet Silverado 2500 HD/3500 HD and GMC Sierra 2500 HD/3500 HD.

The Timbren SES (Suspension Enhancement System) GMRTT35D is designed to stabilize your heavy-duty truck under load while maintaining a smooth ride. This kit utilizes Aeon® hollow rubber springs that feature a progressive spring rate, meaning they automatically adjust to help eliminate vehicle squatting, sagging, and trailer sway. Unlike air bag systems, these cushions require no air lines, fittings, or ongoing maintenance.

This bolt-on upgrade replaces the factory bump stops, providing a significant increase in roll stability and load-carrying capacity without compromising empty ride quality. Installation is straightforward and requires no drilling, typically completed in minutes with basic hand tools.

• Manufacturer Part Number: GMRTT35D
• Eliminates rear end sag and squat under heavy loads
• Absorbs road shocks and improves overall handling
• Maintenance-free design with no air lines or leaks to worry about
• Direct bolt-on installation into factory mounting points
• High-quality progressive rate rubber springs
• Includes all necessary mounting hardware
• Lifetime Warranty

Fits select 1999-2019 Chevrolet Silverado 1500 and GMC Sierra 1500 models, including Classic, HD, LD, and Limited editions.

The Timbren SES (Suspension Enhancement System) GMRTT15S is designed to eliminate vehicle squat and sagging when hauling heavy loads or towing. By replacing the factory bump stops with high-performance hollow rubber springs, this system provides a progressive spring rate that automatically adjusts to uneven loads and road conditions. This results in significantly improved handling, reduced trailer sway, and increased stability without the complexity of air-based systems.

This kit features a simple bolt-on installation that utilizes existing factory mounting points, requiring no drilling or airline routing. Because there are no fittings or hoses to maintain, the system is completely leak-proof and maintenance-free, providing a reliable suspension solution for the life of your truck.

• Manufacturer Part Number: GMRTT15S
• Placement: Rear axle
• Construction: High-capacity hollow rubber cushions
• Installation: No-drill, bolt-on design using basic hand tools
• Maintenance: No airlines or fittings required
• Benefits: Eliminates squatting/sagging and cushions road shocks
• Warranty: Lifetime Warranty

Fits select 2019-2026 Chevrolet Silverado 1500 and GMC Sierra 1500 models.

The Timbren SES (Suspension Enhancement System) is designed to eliminate vehicle squat and sagging under heavy loads. This kit replaces the factory bump stops with high-performance Aeon hollow rubber springs, providing a progressive spring rate that automatically adjusts to uneven loads and road conditions. By absorbing road shocks and stabilizing the vehicle, it significantly reduces trailer sway and improves overall handling while towing or hauling.

Constructed for durability and ease of use, this system requires zero maintenance—there are no air lines to leak and no fittings to manage. Installation is a straightforward bolt-on process that uses factory mounting points with no drilling required. This specific kit, MPN GMRSTT15, provides a reliable alternative to air bags for drivers seeking a set-it-and-forget-it suspension solution.

• Eliminates vehicle squatting and sagging under load
• Progressive rate Aeon rubber springs cushion road shocks
• Simple bolt-on installation with basic hand tools; no drilling required
• No air lines or fittings to maintain or leak
• Improves stability and reduces trailer sway
• Manufacturer Part Number: GMRSTT15
• Includes a Lifetime Warranty

Fits select 2019-2026 Chevrolet Silverado 1500 and GMC Sierra 1500 models (including LTD and Limited variants). This Timbren Suspension Enhancement System (SES) is engineered to eliminate vehicle squat and sagging under heavy loads, providing a level ride and improved handling for towing and hauling.

The system features high-performance progressive-rate rubber springs that absorb road shocks and automatically adjust to uneven loads or road conditions. Unlike air bag systems, these cushions require no air lines, fittings, or ongoing maintenance. The GMRS15 bolts directly to existing factory mounting points using basic hand tools—no drilling or specialized equipment is required for installation.

• Eliminates vehicle squatting and sagging under heavy loads
• Reduces trailer sway and improves overall steering stability
• Maintenance-free design with no air lines or leaks to manage
• Simple bolt-on installation using factory holes (no drilling required)
• Manufacturer Part Number: GMRS15
• Includes a lifetime warranty

Fits select 1996-2021 Cadillac Escalade, Chevrolet Avalanche, Express, Suburban, and Tahoe, and GMC Savana, Yukon, and Yukon XL.

The Timbren SES (Suspension Enhancement System) GMRG25C is engineered to eliminate vehicle squatting and sagging under heavy loads. Utilizing proprietary Aeon hollow rubber springs, this kit provides a progressive spring rate that automatically adjusts to uneven loads and road conditions. This design absorbs road shocks, reduces trailer sway, and improves overall handling stability without compromising ride quality.

This maintenance-free system replaces the factory bump stops with a durable, bolt-on solution. Unlike air-assisted systems, the Timbren SES has no airlines or fittings to leak, making it a reliable choice for heavy-duty towing and hauling. Installation is straightforward, using basic hand tools and factory mounting points with no drilling required.

• Manufacturer Part Number: GMRG25C
• Material: High-performance Aeon hollow rubber springs
• Installation: Direct bolt-on to factory mounting points; no-drill design
• Maintenance: Zero maintenance; no air pressure to monitor or lines to route
• Features: Progressive spring rate; eliminates squat and improves load leveling
• Includes: Pair of Aeon rubber springs and all necessary mounting hardware
• Warranty: Manufacturer's Lifetime Warranty

Fits select 2001-2010 Chevrolet Silverado 3500 and GMC Sierra 3500 models (Base, LS, LT, WT, Classic, and HD).

The Timbren SES (Suspension Enhancement System) GMRCK35C is a maintenance-free solution designed to eliminate vehicle squatting and sagging under heavy loads. By replacing the factory bump stops with high-performance progressive-rate rubber springs, this system provides additional support that automatically adjusts to load weight and road conditions. This kit is specifically engineered to improve stability and reduce trailer sway without the complexity of air lines or compressors.

• Eliminates rear-end sag and cushions road shocks for improved handling while hauling
• Progressive-rate rubber springs provide increased support as the load increases
• 100% bolt-on installation using basic hand tools with no drilling required
• Maintenance-free design with no air lines or fittings to leak or fail
• Manufacturer Part Number: GMRCK35C
• Includes all necessary brackets and hardware for a complete installation
• Backed by a lifetime warranty

Fits select 1999-2010 Chevrolet Silverado 1500, 1500 HD, 2500, 2500 HD and GMC Sierra 1500, 1500 HD, 2500, 2500 HD trucks.

The Timbren SES (Suspension Enhancement System) GMRCK25S is engineered to eliminate vehicle squatting, sagging, and trailer sway under heavy loads. Unlike air helper springs, this system utilizes Aeon hollow rubber springs that require no air lines, no fittings, and zero maintenance. The progressive spring rate of the rubber cushions automatically adjusts to uneven loads and road conditions, providing a smoother ride when loaded while maintaining factory ride quality when empty.

Installation is straightforward and requires no drilling or routing of air lines. This kit bolts directly to factory mounting points using basic hand tools, making it a reliable solution for improving towing stability and hauling capacity without the complexity of traditional air suspension systems.

• Manufacturer Part Number: GMRCK25S
• Eliminates rear-end sag and improves vehicle handling under load
• Aeon hollow rubber springs absorb road shock and dampen vibrations
• Maintenance-free design with no air lines to leak or fittings to fail
• Easy bolt-on installation with no drilling required
• Includes all necessary mounting hardware and instructions
• Backed by a Lifetime Warranty

Fits select 1988-1999 GMC C2500 and 2011-2026 Chevrolet Silverado and GMC Sierra 2500 HD/3500 HD.

The Timbren SES (Suspension Enhancement System) GMRCK25D is engineered to eliminate vehicle squat and sagging when hauling heavy loads or towing trailers. By replacing the factory bump stops with high-performance hollow rubber springs, this kit provides additional support and stability without compromising empty ride quality. Unlike air bag systems, these cushions are maintenance-free and automatically adjust to uneven loads or road conditions.

• Eliminates trailer sway and improves overall handling under load by providing progressive spring rates.
• Cushions road shocks to reduce wear and tear on the factory suspension components.
• True fit-and-forget design with no air lines, fittings, or compressors to leak or fail.
• Easy bolt-on installation using basic hand tools; no drilling or frame modification required.
• Includes high-performance rubber cushions and all necessary mounting hardware.
• Backed by a manufacturer's Lifetime Warranty.
• Manufacturer Part Number: GMRCK25D