Fits select 2000-2025 Subaru Legacy, Outback, Impreza, Forester, WRX, STI, and Crosstrek models. The Whiteline KDT905 Front Differential Positive Power Kit is designed to eliminate drivetrain slop and improve power delivery by reducing movement in the front differential mounting points.

Constructed from Whiteline's advanced synthetic elastomer, these bushings provide exceptional resistance to oil, grease, ozone, and extreme weathering. The metal components feature a protective plating and powder-coated finish that acts as a hard skin, significantly outperforming conventional paint in resisting corrosion and harsh road conditions.

• Eliminates unwanted differential movement for more direct power transfer.
• Synthetic elastomer formulation maintains its physical properties under heavy load.
• Internal grease reservoirs provide continual self-lubrication for optimum friction management.
• Supplied with extreme pressure molybdenum disulphide (LM) based grease for extended service life.
• Includes comprehensive installation guide for a straightforward upgrade.
• Manufacturer Part Number: KDT905

Fits select 2004-2025 Subaru Forester, Impreza, WRX, STI, Legacy, Outback, and XV Crosstrek.

The Whiteline KDT903 Positive Power Kit is engineered to reduce drivetrain slop by filling the voids within the original factory differential mounting bushings. By stabilizing the differential, these inserts maintain proper pinion angles and minimize initial torque loss, resulting in improved gear shift feel and more direct power transfer to the wheels.

These inserts are manufactured from a high-quality synthetic elastomer, offering superior resistance to oil, grease, ozone, and environmental weathering compared to standard rubber. Designed as a supplemental upgrade rather than a full replacement, the KDT903 inserts install directly into factory housing voids, making it an efficient solution for performance street or track use without the need for a hydraulic press.

• Maintains pinion angles for reduced torque loss and improved drivetrain response
• Synthetic elastomer formulation provides high resistance to oils and weathering
• Internal grease reservoirs facilitate continuous self-lubrication
• Includes extreme pressure molybdenum disulphide (LM) based grease for extended service life
• Easy-install design works with existing factory bushings
• Manufacturer Part Number: KDT903

The Whiteline KDT902 Rear Positive Traction Kit is a precision-engineered solution for eliminating "lost motion" in your Subaru's rear subframe. Fits select 2008-2014 Subaru Forester and Impreza models, including WRX and STI. Unlike traditional replacement bushings, these inserts are designed to work with the original factory bushings, filling the voids to reduce crossmember movement and misalignment during high-load cornering and acceleration.

Manufactured from a high-quality synthetic elastomer, this kit is engineered to resist oil, grease, ozone, and weathering. The inserts feature internal grease reservoirs for self-lubrication and come supplied with molybdenum disulphide (LM) grease to ensure long-term durability and silent operation. This is an ideal upgrade for DIY enthusiasts looking for a more positive rear-end feel without the complexity of a full bushing press-out.

• Reduces rear crossmember movement for improved handling and alignment stability
• Specially bonded synthetic elastomer for high-load bearing capacity
• Insert design allows for easy installation into factory bushing voids
• Internal grease reservoirs for continuous friction management
• Includes extreme pressure molybdenum disulphide based grease
• Manufacturer Part Number: KDT902

Fits select 1993-2026 Subaru Impreza, WRX, STI, Forester, Legacy, Outback, Ascent, Crosstrek, and Saab 9-2X.

Subaru engines utilize a pitch stop mount to control the forward and aft twisting motion of the engine and drivetrain during acceleration and deceleration. The factory unit is often constructed from a plastic body with high-compliance rubber bushings, prioritizing cabin comfort over throttle response. This design allows for significant engine movement, which translates to "slop" or shudder in the drivetrain.

The Whiteline KBR39 Pitch Stop Mount is a performance upgrade engineered to eliminate this movement. CNC-machined from billet 6061-T6 aluminum and fitted with low-compliance synthetic elastomer bushings, this mount provides a rigid connection that ensures faster, more positive power delivery. The anodized finish provides a long-lasting protective barrier against corrosion and wear while maintaining a clean aesthetic under the hood.

• Manufacturer Part Number: KBR39
• Material: Billet 6061-T6 Aluminum
• Finish: Premium Anodized Alloy
• Bushing Type: Low Compliance Synthetic Elastomer
• Installation: Includes detailed installation guide; bolts to factory mounting points

Simplify your suspension tuning with the UMI Performance Thrust Bearing Kit (MPN 7995-102). Specifically designed for use with Viking and UMI Performance coilovers, this kit is engineered to reduce the friction generated between the coil spring and the threaded spring seat during ride height adjustments.

By placing these needle bearings between the spring and the seat, you allow the adjustment nut to rotate freely without binding against the spring. This is a critical upgrade for enthusiasts who intend to fine-tune their vehicle's stance while the coilovers are installed on the car, as it prevents component galling and significantly reduces the effort required to turn the spanner wrench under load.

• Compatibility: Engineered for Viking and UMI Performance coilover systems.
• Function: Eliminates spring-to-seat friction for smoother height adjustments.
• Durability: High-load needle bearings designed for automotive suspension environments.
• Included Hardware: Complete thrust bearing set and one heavy-duty spanner wrench.
• Installation: Recommended for all on-car height adjustments to protect hardware finish.

The UMI Performance 7917-101 Thrust Bearing Kit is a specialized upgrade designed to facilitate smoother ride height adjustments on Viking and UMI coilover shocks. By installing these needle-roller bearings between the coil spring and the threaded spring seat, you eliminate the friction that occurs when turning the adjuster nut against a compressed spring.

• Precision Tuning: Allows the spring seat to rotate freely on a bearing surface, significantly reducing the effort required to adjust vehicle height.
• Protects Hardware: Minimizes wear on the aluminum spring seats and coilover threads by preventing binding under load.
• Application Support: Engineered specifically for use with UMI Performance and Viking coilover systems.
• Installation Note: While not required for initial assembly, this kit is essential for anyone planning to perform on-car height adjustments.
• Manufacturer Part Number: 7917-101

Fits select 1982-2002 Chevrolet Camaro and Pontiac Firebird models.

The UMI Performance 3004 factory torque arm replacement bushing is designed to restore drivetrain stability and eliminate the excessive play associated with aged or degraded original equipment. This bushing serves as a direct replacement for the factory-style mount, providing a reliable solution for GM F-Body owners looking to maintain their vehicle's factory torque arm setup while improving overall chassis response and reducing drivetrain clunks.

• Direct-fit replacement for the factory torque arm bushing.
• Helps eliminate unwanted torque arm movement during acceleration and braking.
• Designed for use with original equipment mounting brackets.
• Manufacturer Part Number: 3004

Fits select 1965-1988 GM A-Body and G-Body vehicles, including Buick GS, Regal, and Skylark; Chevrolet Chevelle, El Camino, Malibu, and Monte Carlo; GMC Caballero; Oldsmobile 442 and Cutlass; and Pontiac Grand Prix, GTO, and LeMans.

UMI Performance high-durometer polyurethane bushings are designed to replace factory rubber bushings that have become soft, cracked, or dry-rotted over decades of use. These bushings specifically replace the two upper control arm differential bushings that stay attached to the rear end housing "ears." By upgrading from rubber to polyurethane, you reduce unwanted axle housing rotation and deflection, restoring precise handling and improved traction for both street and track applications.

This kit is manufactured in the USA and includes polyurethane washers designed to prevent the bushings from "walking" side-to-side during hard cornering or acceleration. These are a direct replacement for the OE components and provide a significantly more durable solution than standard rubber replacements.

• Replaces factory rear end housing "ear" bushings
• High-durometer polyurethane construction
• Prevents bushing walk with included washers
• Improves suspension geometry and response
• Made in the USA
• Manufacturer Part Number: 3000-R

Kit Includes: (2) Polyurethane bushings and (2) Polyurethane washers.

Fits select 1965-1997 Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models.

UMI Performance 3000-B polyurethane bushings are designed to replace the compliant factory rubber rear end housing bushings. Over time, original equipment rubber is susceptible to dry rot, cracking, and hardening due to environmental exposure and mechanical stress, which compromises suspension geometry and ride quality. These high-durometer polyurethane replacements restore precision to your rear suspension by securing the upper control arm mounting points on the differential housing.

Specifically engineered for the "ears" of the rear end housing, this kit includes two bushings and two polyurethane washers. The included washers are critical for preventing the bushings from walking side-to-side during lateral loading, ensuring consistent axle centering whether on the street or the track. These are a direct-fit upgrade for vehicles retaining factory-style mounting points.

• Replaces factory upper control arm rear end differential bushings
• High-durometer polyurethane construction for increased durability and performance
• Includes two (2) bushings and two (2) polyurethane washers to prevent lateral walking
• Compatible with factory mounting points on rear end housing "ears"
• Made in the USA
• Manufacturer Part Number: 3000-B

Fits 1979-2004 Ford Mustang models including Base, GT, LX, SVO, Mach 1, and SVT Cobra.

Replace worn factory rubber with this UMI Performance polyurethane bushing kit to restore rear-end stability and performance. Original rubber bushings are prone to dry-rotting, cracking, and hardening over time, which compromises ride quality and leads to excessive axle deflection. These polyurethane replacements are engineered for the two upper rear end differential bushings located in the differential housing "ears," providing a more consistent and durable solution for both street driving and drag racing.

• Replaces upper differential housing bushings for improved axle control
• High-performance polyurethane construction resists rot and degradation
• Ideal for street and high-performance drag racing applications
• Installation Time: 2-4 hours
• Note: Requires reuse of the existing outer metal shells
• Manufacturer Part Number: 1008-R

Fits select 1990-2015 Lexus GS, IS, LS, SC, and Toyota Supra. This SuperPro Rear Upper Forward Differential Pinion Mount Insert Bushing Kit is designed to fill the voids in the factory rubber bushings, significantly reducing excessive drivetrain movement and axle tramp without the harshness of a full solid mount. This kit stabilizes the differential housing, ensuring more consistent power delivery and improved throttle response.

Manufactured in Australia using SuperPro's proprietary engineering-grade polyurethane, these inserts are formulated to remain unaffected by extreme temperatures, oils, coolant, or road grime. Unlike standard rubber, this polyurethane blend maintains its shape and memory under high-load conditions, preventing the alignment shifts that lead to uneven tire wear and vague handling. This is a direct-fit solution for enthusiasts looking to refresh a high-mileage drivetrain or optimize a performance-tuned chassis.

• Proprietary polyurethane formula for maximum durability and quiet operation
• Reduces differential movement to improve power transfer and handling precision
• Engineered to resist degradation from oils, water, and extreme heat
• Engineered and manufactured in Australia
• Includes installation hardware and instructions where applicable
• Manufacturer Part Number: SPF2769K
• Lifetime Warranty

Fits 1998-2007 Toyota Land Cruiser and Lexus LX470 models.

Lifting a 100 Series Land Cruiser increases the operating angle of the front CV (constant velocity) joints. This steeper angle accelerates joint wear and places excessive stress on the CV boots, often leading to splitting and premature failure. The SuperPro TRCLC100DD differential drop kit is a direct bolt-on solution designed to restore proper axle geometry by lowering the front differential approximately 25mm.

By reducing the angles at which the CV joints operate, this kit helps prevent the high costs associated with replacing axles and boots. This modification is especially critical for vehicles equipped with larger or wider wheels and tires, which further accelerate drivetrain wear.

• MPN: TRCLC100DD
• Drop Height: Approximately 25mm
• Construction: Direct bolt-on design for factory mounting points
• Protection: Reduces stress on CV boots and internal joint components
• Application: Essential for lifted 100 Series chassis configurations

Vehicle Fitment:

Fits select 2008-2024 Toyota 4Runner, FJ Cruiser, and Lexus GX460. This SuperPro front differential drop kit (TRCHILUXDD) is essential for maintaining drivetrain longevity on lifted Toyota and Lexus 4x4 models. When installing a suspension lift, the front Constant Velocity (CV) joints are forced into steeper operating angles. This increased stress frequently leads to premature CV boot failure and accelerated wear on the joints themselves.

This bolt-on kit corrects front axle geometry by lowering the front differential approximately 25mm (1 inch). By restoring the CV joints to a more neutral angle, you significantly reduce the risk of expensive axle repairs and boot splits. The spacers are designed specifically to allow the original factory bash plate or skid plate to be refitted in its original position where applicable.

• Lowering Distance: Approximately 25mm (1")
• Corrects CV joint operating angles on lifted vehicles
• Compatible with factory bash plates
• Complete bolt-on installation
• Includes all required spacers, bolts, washers, and nuts
• Manufacturer Part Number: TRCHILUXDD

Fits 2007-2015 Mazda CX-9 (Grand Touring, Sport, Touring).

The SuperPro SPF5220K Rear Differential-to-Subframe Support Bushing Set is a high-performance solution for the common failure of factory rear differential mount bushings on the Mazda CX-9. Original rubber bushings often degrade quickly, causing excessive drivetrain movement and noise. SuperPro solves this with a proprietary engineering-grade polyurethane formula designed to restore precision and durability without sacrificing cabin comfort or road isolation.

• Replaces failure-prone factory rear differential-to-subframe support bushings
• Constructed from SuperPro’s bespoke polyurethane for superior service life
• Compound design engineered to retain factory noise and vibration (NVH) isolation
• Unaffected by extreme temperatures, oils, water, or coolant
• Enhances vehicle handling, alignment stability, and power delivery
• Designed, engineered, and manufactured in Australia
• Manufacturer Part Number: SPF5220K
• Includes: Lifetime Warranty

Fits select 2013-2025 Mazda CX-5 and 2016-2023 Mazda CX-9 SUVs.

The factory center rear differential mount in the Mazda CX-5 and CX-9 is a known weak point, prone to premature wear that results in excessive drivetrain movement, noise, and vibration. To make matters worse, Mazda typically only offers this mount as part of a complete rear subframe assembly, making out-of-warranty repairs unnecessarily expensive. The SuperPro SPF5108K center support bushing provides a targeted, high-durability solution that allows you to replace only the failed component.

Engineered to restore driveline stability without sacrificing ride quality, this bushing maintains new-car levels of comfort and isolation while offering significantly better longevity than the OE rubber design. It is a true "fix it once" component designed to handle the torque loads of the Mazda AWD system indefinitely.

• Replaces the failure-prone factory center rear differential mount
• Cost-effective alternative to purchasing a full OEM rear subframe
• Restores driveline alignment and reduces unwanted differential movement
• Engineered to maintain original levels of NVH (Noise, Vibration, Harshness) isolation
• Manufacturer Part Number: SPF5108K
• Includes SuperPro's lifetime warranty

Fits 1984-1996 Chevrolet Corvette models including Base, ZR-1, Grand Sport, and Special Editions.

The factory rear differential mount bushing on the C4 Corvette is a known weak point, often suffering from a short service life that leads to excessive drivetrain movement. This SuperPro Rear Differential Mount Bushing Kit (SPF4894K) is engineered to solve this issue by replacing the soft, prone-to-failure OE rubber with a high-durability polyurethane component.

SuperPro has designed this kit to provide a significantly longer service life than the original part without the harshness typically associated with aftermarket bushings. The result is a more stable differential mount that delivers zero increased cabin noise or NVH (Noise, Vibration, and Harshness), making it ideal for both street and performance use.

• Manufacturer Part Number: SPF4894K
• Position: Rear Differential Mount
• Material: High-grade proprietary polyurethane
• Replaces worn or failed OEM bushings
• Engineered for long service life and zero cabin noise
• Direct fit for factory mounting points

Fits select 1990-2022 Lexus GS, IS F, LS400, RC F, SC300, and Toyota Supra (including Twin Turbo).

The SuperPro Rear Upper Forward Differential Pinion Mount Bushing Set (SPF4888K) is designed to replace the soft, failure-prone factory rubber bushings. Over time, OEM units degrade, allowing excessive differential movement under load. This results in sloppy throttle response and increased drivetrain noise and vibration. This upgrade restores precision to the drivetrain by more accurately locating the differential.

Engineered from advanced materials that resist softening and degradation, these bushings provide a significantly longer service life than natural rubber. Despite the performance gains, SuperPro has tuned this set to maintain factory-level noise, vibration, and harshness (NVH) isolation, ensuring cabin comfort is not compromised.

• Manufacturer Part Number: SPF4888K
• Location: Rear Upper Forward (Pinion Mount)
• Material: High-performance proprietary material for improved longevity
• Performance: Reduces differential movement for better responsiveness
• Comfort: Maintains OEM levels of NVH isolation
• Fitment: Fits specific 1990-2022 Lexus and Toyota chassis

Fits 1993-1998 Toyota Supra Twin Turbo models.

SuperPro's rear upper rearward differential-to-subframe mount kit is engineered to replace the soft, fast-wearing factory rubber bushings. By upgrading to these high-quality polyurethane components, you stabilize the differential housing, reducing wheel hop and improving power delivery to the ground. This 80A durometer version is specifically designed for enthusiasts who want a significant performance increase while retaining street-friendly NVH (Noise, Vibration, and Harshness) isolation. It offers a perfect balance for street-driven Supras that occasionally see track or spirited use.

• Replaces soft OEM rubber mounts for improved drivetrain stability
• 80A durometer material offers high durability with moderate compliance
• Retains factory-like comfort and NVH isolation
• Precise fitment for the rear upper rearward mounting position
• Includes all necessary bushings for the differential-to-subframe interface
• Manufacturer Part Number: SPF4857K

For very high-power builds or dedicated track cars where maximum rigidity is required, the stiffer SPF4857-90K version is recommended.

Fits 1993-1998 Toyota Supra Twin Turbo.

The SuperPro SPF4857-90K Motorsport-series rear differential mount kit is engineered to replace soft, fast-wearing factory rubber bushings that allow excessive drivetrain movement. By utilizing a 90A durometer polyurethane, this kit significantly reduces differential deflection under heavy power application and aggressive gear changes. This ensures more efficient power transfer to the wheels and minimizes interruption in power delivery during hard shifts.

Designed specifically for high-horsepower builds and track-focused vehicles, this Motorsport-grade version provides a more positive location for the rear differential than standard street-performance bushings. While optimized for performance, the higher durometer material may result in a minor increase in Noise, Vibration, and Harshness (NVH).

• Manufacturer Part Number: SPF4857-90K
• Material: High-grade 90A Durometer Polyurethane
• Location: Rear Upper Rearward Differential-to-Subframe
• Optimized for circuit, drag racing, and high-horsepower applications
• Reduces drivetrain deflection for improved throttle response

Fits 2005-2010 Jeep Grand Cherokee and Commander (Laredo, Limited, Overland, Sport, SRT8).

The factory differential mount bushings on the Jeep WK and XK platforms are known for a relatively short service life, often leading to excessive driveline movement and vibrations. The SuperPro Front Differential Mount Bushing Set is engineered to solve these reliability issues. By replacing the failure-prone OE rubber with high-durability materials, this kit ensures a longer service life without introducing unwanted cabin noise or harshness.

• Precision-engineered for direct replacement of factory differential mount bushings.
• Designed for high service life even under demanding driving conditions.
• Maintains factory refinement with zero cabin noise during operation.
• Straightforward installation to restore driveline stability.
• Manufacturer Part Number: SPF4427K

Fits select 1999-2021 BMW 3 Series (323i, 325i, 328i, 330i) and Z4 models. This SuperPro bushing kit (SPF4330K) is engineered to replace the factory forward differential mount bushings, often referred to as the pinion mount bushings.

Original equipment (OE) units utilize soft natural rubber that degrades over time, especially under spirited driving or high-torque loads. This wear leads to excessive differential movement, which manifests as sluggish throttle response, driveline clunks, and unwanted vibrations. SuperPro’s proprietary material provides a significant upgrade by more accurately locating the differential without the harsh noise, vibration, and harshness (NVH) typically associated with harder performance bushings.

• Improved Response: Eliminates the "sloppy" feeling during acceleration and deceleration by securing the pinion angle.
• Durability: Engineered to resist softening and degradation caused by environmental factors and mechanical stress.
• Ride Quality: Maintains factory-like cabin comfort while providing superior performance over OEM rubber.
• Manufacturer Part Number: SPF4330K

Vehicle Fitment:
1999-2000 BMW 323i Base
2000 BMW 323Ci Base
2001-2005 BMW 325i Base
2001-2006 BMW 325Ci Base
2000 BMW 328Ci Base
2001-2005 BMW 330i Base
2001-2006 BMW 330Ci Base
2003-2005 BMW Z4 2.5i & 3.0i
2006-2008 BMW Z4 Roadster/Coupe 3.0i/3.0si
2006-2008 BMW Z4 M Coupe & M Roadster
2009-2016 BMW Z4 sDrive28i, sDrive30i, sDrive35i, sDrive35is
2019-2021 BMW Z4 sDrive30i

Fits select 2013-2025 Scion FR-S, Subaru BRZ, and Toyota 86/GR86 models.

The SuperPro Rear Upper Forward Differential Pinion Mount Bushing Set replaces the soft factory rubber units that frequently degrade under load. When original bushings soften or fail, the differential moves excessively during torque transitions, resulting in vague throttle response, increased vibration, and audible clunking during gear changes. This SuperPro kit is engineered to eliminate this movement and restore drivetrain precision.

Unlike standard performance bushings that can transmit excessive road noise, SuperPro uses a proprietary material designed to maintain factory levels of NVH (Noise, Vibration, and Harshness) isolation. This ensures your vehicle retains its daily-driving comfort while benefiting from significantly improved rear-end stability and longer component service life.

• Part Number: SPF4110-90K
• Location: Rear Differential - Upper Forward Pinion Mount
• Replaces soft OEM rubber with high-durability SuperPro material
• Reduces differential movement under acceleration and deceleration
• Maintains factory cabin comfort and NVH levels
• Kit includes necessary bushings for a complete forward pinion mount overhaul

Fits select 2006-2021 BMW 1, 2, 3, and 4 Series, plus X1, M235i, M240i, and ActiveHybrid 3 models.

Factory differential mount bushings are often a weak point in the BMW drivetrain, identified for having a relatively low service life and allowing excessive movement under load. The SuperPro SPF3950K Rear Differential Mount Bushing Set is engineered to replace these worn OE components with a more durable solution that restores drivetrain stability without sacrificing cabin comfort.

• Engineered for a high service life to outperform standard OEM bushings
• Designed for straightforward installation in factory mounting points
• Delivers zero cabin noise, vibration, or harshness (NVH) for a refined ride
• Improves power delivery by reducing differential housing deflection
• Manufacturer Part Number: SPF3950K

Fits select 2003-2020 Nissan 350Z, 370Z and Infiniti G35, G37 models.

The SuperPro SPF3856K Rear Differential-to-Subframe Mount Bushing Kit is engineered to replace the soft factory rubber units that connect the differential to the rear subframe. In Z and G chassis vehicles, OEM bushings are a known failure point; they soften and tear over time, leading to excessive differential movement, drivetrain slop, and audible clunking during gear changes or aggressive throttle application.

This kit restores drivetrain precision by more accurately locating the differential under load. Unlike generic polyurethane upgrades that can introduce harshness, SuperPro's proprietary material is designed to maintain factory-level NVH (Noise, Vibration, and Harshness) isolation, ensuring cabin comfort remains at OEM levels while performance is significantly enhanced. These bushings are resistant to oils, chemicals, and thermal degradation, providing a service life that far outlasts natural rubber components.

• Direct replacement for the rearward differential-to-subframe mount
• Eliminates drivetrain slop and improves throttle responsiveness
• Maintains factory levels of noise and vibration isolation
• High-durability material resists softening and degradation
• Includes necessary bushings for a complete install
• Manufacturer Part Number: SPF3856K

Fits select 2003-2020 Nissan 350Z and 370Z, and Infiniti G25, G35, and G37 models.

The factory rear differential mounting bushings on the Nissan Z and Infiniti G-series chassis are known for a relatively short service life, often resulting in drivetrain slop or fluid leaks from the subframe-mounted bushing. The SuperPro SPF3849K Rear Differential Bushing Set is engineered to solve this common failure point, providing a durable, high-performance replacement for the OEM components.