Maintain the integrity of your 4x4 drivetrain venting system with genuine ARB replacement tube fittings. Designed specifically for use with the ARB Differential Breather Kit, these fittings provide a secure, leak-free connection for your breather lines. This ensures your differentials, transfer case, and gearbox can vent internal pressure safely without allowing water, dust, or silt to enter the housing during deep water crossings or dusty trail runs.

• Replacement push-in style fittings compatible with the ARB Differential Breather Kit system.
• Constructed to resist corrosion and environmental degradation from road salt, gear oil, and trail debris.
• Provides a reliable seal for polyurethane tubing to prevent vacuum-induced contamination of gear lubricants.
• Simple push-to-connect design allows for quick field repairs or new installation routing.

Fits 2007-2011 Subaru Impreza WRX STI, WRX STI Limited, and WRX STI Special Edition.

The OS Giken Super Lock LSD is a premier mechanical limited-slip differential designed to maximize traction and power delivery for the GDB Subaru Impreza STI. This rear differential unit solves the issues of inconsistent wheel spin and power loss common with factory units. By utilizing a high-capacity pressure plate system, the Super Lock LSD provides smooth, progressive locking that improves stability during hard cornering and ensures both rear tires are working to propel the vehicle forward.

• Patented OS Giken Super Lock mechanical design for superior grip
• Specific fitment for GDB chassis Subaru WRX STI rear housings
• Improves corner exit speeds and high-torque launch consistency
• Precision-engineered internals for high-performance durability
• Direct replacement for the factory rear limited-slip differential

Fits select 1984-2009 Toyota 4Runner, Celica, FJ Cruiser, Land Cruiser, and Pickup models with 8-inch rear differentials.

The Eaton Detroit Truetrac (MPN: 913A610) is a helical-gear style, limited-slip differential (LSD) engineered to provide smooth, automatic traction on demand. Unlike traditional clutch-type differentials, the Truetrac utilizes parallel axis helical gears to manage torque bias. This design eliminates the need for friction modifiers or special lubrication while providing maintenance-free operation for the life of the unit. During normal driving, it performs like an open differential; when one wheel loses traction, the internal gears transfer torque to the high-traction wheel to maximize acceleration and stability.

• MPN: 913A610
• Axle Spline Count: 30
• Axle Shaft Diameter: 1.30 inches
• Differential Type: Helical Gear Limited Slip
• Ring Gear Diameter: 8 inches
• Position: Rear
• Maintenance: Maintenance-free design with no clutches or springs to wear out
• Operation: Smooth, quiet engagement works in both forward and reverse

Fits select 1980-2012 Chevrolet, Chrysler, Dodge, and Ford vehicles equipped with Dana 60HD axles. The Eaton Detroit Locker is the industry standard for 100% automatic locking differentials, providing ultimate traction for everything from heavy-duty work trucks to extreme off-road builds.

Designed with a legendary, robust internal mechanism, the Detroit Locker ensures both wheels remain in drive mode to deliver maximum torque to the ground, even if one wheel loses contact with the surface. This unit operates automatically in both forward and reverse, engaging when traction is needed and unlocking to allow for wheel speed differentiation during cornering. Its clutchless design eliminates the need for friction modifiers and periodic maintenance, offering a set-it-and-forget-it solution for high-torque applications.

• Manufacturer Part Number: 225SL29A
• Axle Type: Dana 60HD
• Spline Count: 35
• Axle Shaft Diameter: 1.50 inches
• Gear Ratio Compatibility: 4.56 and Up
• Locking Action: 100% Automatic
• Design: Maintenance-free, clutchless internal components

Fits select 1975-1989 Datsun 280Z, 280ZX, and Nissan 300ZX models equipped with the Long Nose R200 differential.

The OS Giken Super Lock LSD is a premier clutch-type limited-slip differential designed to transform the handling and traction of your classic Z-car. Unlike standard gear-type or viscous units, the Super Lock system uses a progressive locking mechanism that allows for smooth, predictable engagement while providing maximum lock under high-load conditions. This eliminates unwanted wheel spin and ensures power is delivered effectively to the pavement during corner exit and straight-line acceleration.

• Precision-machined internal components for maximum durability and consistent performance
• Customizable lock timing and pressure to suit specific street or track setups
• Progressive clutch engagement reduces chatter and mechanical noise
• Specifically engineered for the Long Nose R200 housing found in Datsun 280Z/280ZX and early 300ZX chassis
• Replaces the factory open differential or worn OEM limited-slip units

Fits 2016-2020 Mazda MX-5 Miata ND models including Club, Grand Touring, Sport, and RF variants (2.0L).

Upgrade your ND Miata drivetrain with the OS Giken Limited Slip Differential (MPN: MZ191-HA). Engineered to provide superior traction and stability, this LSD replaces the factory differential unit to deliver more consistent power to the ground. Whether on the street or at the track, the OS Giken LSD minimizes wheel spin and improves corner-exit acceleration by efficiently distributing torque between the rear wheels.

• Manufacturer Part Number: MZ191-HA
• Direct fit for 2.0L Mazda MX-5 Miata (2016-2020)
• Precision-machined internal components for maximum durability
• Enhances vehicle control and predictability under high-performance driving conditions
• Engineered for smooth engagement and quiet operation

Fits select 2003-2017 Nissan 350Z, 370Z and Infiniti G35, G37 models equipped with manual transmissions.

The OS Giken Super Lock LSD (Limited Slip Differential) is engineered to provide superior traction and stability for high-performance driving. Designed specifically for the Z-chassis and G-series manual transmission drivelines, this differential replaces the factory unit to offer more predictable handling under both acceleration and cornering. The Super Lock design allows for a high degree of locking force while maintaining smooth, progressive engagement, making it a critical upgrade for both street performance and dedicated track use.

• Manufacturer Part Number: NS111-HA
• Transmission Compatibility: Manual Transmission (MT) Only
• Engine Compatibility: VQ35DE, VQ35HR, VQ37VHR (as per vehicle fitment)
• High-capacity friction plate design for maximum durability and locking force
• Improves power delivery and cornering exit speeds by reducing inner-wheel spin
• Engineered for precise fitment within the factory rear differential housing

Fits select 1988-2013 BMW M3, M5, M6, Z4 M Coupe, and 740i/740iL/750iL models. The OS Giken Super Lock LSD (BM237-HA) is a high-performance 1.5-way mechanical limited-slip differential engineered to deliver progressive, predictable traction under any driving condition.

Unlike traditional clutch-type differentials, the Super Lock design utilizes a patented pressure ring and an increased number of friction plates. This allows for near 100% lock-up performance when torque is applied, without the chattering or harsh engagement typically found in race-spec units. For the enthusiast, this means superior corner-exit stability and more efficient power delivery to the ground.

• Increased Plate Capacity: Houses more friction plates than standard units for maximum torque transfer.
• Progressive Locking: Patented design ensures smooth transition from open to locked, reducing tire wear and drivetrain shock.
• Forged Steel Housing: High-strength construction ensures long-term durability in high-torque BMW applications.
• Maintenance-Friendly: Designed for reliability with high-quality internal components that resist heat and wear.
• MPN: BM237-HA

Fits select 1985-2009 Toyota 4Runner, Pickup, FJ Cruiser, and Lexus GX470 models equipped with the V6 rear differential.

The Yukon Gear Grizzly Locker (YGLTV6-30) is a premium mechanical positive-locking differential engineered for the most demanding off-road environments, from technical rock crawling to high-speed desert racing. This unit delivers 100% power to both drive wheels simultaneously to overcome traction loss, yet utilizes a patented internal design to allow for smooth disengagement while negotiating turns on the trail or street.

Constructed with high-strength 8620 alloy steel internals, this locker is built to withstand extreme shock-loading. The clutch teeth are designed with a larger radius at the base, offering up to 350% greater strength compared to standard back-cut designs, specifically to resist breakage during axle failure or under extreme torque loads.

• 8620 alloy steel internal gears for superior durability and component life
• Patented internal design reduces common mechanical locker failure points
• Assembled in the USA
• Direct replacement for factory open or limited-slip carriers in Toyota V6 8-inch rear housings
• Manufacturer Part Number: YGLTV6-30

Fits select 1979-2014 Ford F-150, Mustang, Explorer, Ranger, Bronco, and Crown Victoria, plus select Lincoln and Mercury models with Ford 8.8" 31-spline axles.

Yukon Mini Spools offer a cost-effective traction solution for off-road and racing applications requiring full-time lockup. This unit installs directly into a standard open carrier case, replacing the original spider gears to ensure 100% power delivery to both tires at all times. By eliminating differential action, it provides maximum grip in loose or high-performance environments.

Note: Mini spools are designed for off-road or racing use only and are not recommended for street-driven vehicles. For extreme horsepower or oversized tire applications, a full spool is recommended for additional strength.

• Provides 100% traction to both wheels simultaneously
• Designed for installation in standard open carrier cases
• Replaces factory spider gears
• Compatible with Ford 8.8 in. differentials with 31-spline axles
• Manufacturer Part Number: YP MINSF8.8-31

Fits 2005-2012 Porsche Boxster and 2006-2012 Cayman models equipped with manual transmissions.

The OS Giken Super Lock LSD (PR151-HA) is a high-performance clutch-type limited-slip differential engineered for drivers who demand predictable traction on both the street and the track. Unlike standard LSDs that can exhibit jerky engagement, the Super Lock design uses a specialized pressure ring and a high count of friction plates to provide progressive, smooth locking that scales with torque input. This results in superior cornering stability and reduced inside-wheel spin without compromising drivability.

• Manufacturer Part Number: PR151-HA
• Transmission Compatibility: Manual Transmission (MT) Only
• Internal Design: Progressive clutch-type with high friction plate capacity
• Locking Characteristic: Speed and torque sensitive for smooth engagement
• Housing: High-strength steel construction for maximum durability

Full Fitment List:

• 2005-2012 Porsche Boxster (Base, S, Spyder, Limited Edition, Black Edition)
• 2006-2012 Porsche Cayman (Base, S, R)

Fits select 1966-2018 Ford Bronco and Jeep CJ, Cherokee, Comanche, Grand Cherokee, Liberty, Wagoneer, and Wrangler models with Dana 30 front axles (27-spline, 3.54 & numerically lower gear ratios).

The ARB RD101 Air Locker is the industry standard for selectable traction, allowing you to transition from an open differential for street driving to a 100% locked axle for technical off-roading with the flick of a switch. This pneumatically operated system prevents internal differential gears from rotating, ensuring both axle shafts turn at the same speed to maintain maximum traction in mud, rocks, or snow. The RD101 features a high-strength two-piece design with a patented timed locking mechanism for ultra-fast engagement and superior durability.

• Replaces factory open differential for 100% on-demand traction
• Steel-reinforced elastomer bonded annular seal handles extreme temperature fluctuations
• Minimal moving parts design ensures long-term trail reliability
• Forged gears provide maximum strength and durability under load
• Requires an on-board air compressor for operation (sold separately)
• Kit includes: ARB RD101 Air Locker, activation switch, solenoid valve, air line, and bulkhead fitting

Fits select 1986-1999 Suzuki Samurai, Sidekick, Vitara, Grand Vitara, and Geo Tracker with 10-bolt ring gears and 26-spline axles.

The ARB RD208 Air Locker provides 100% traction on demand, allowing you to transition from an open differential to a fully locked setup with the flip of a dash-mounted switch. This pneumatically operated system uses an internal locking mechanism to prevent axle shafts from turning independently, ensuring maximum torque is delivered to both wheels when you need it most. Unlike automatic lockers, the Air Locker maintains factory-style on-road drivability and handling when disengaged.

Engineered for extreme off-road use, the RD208 features a high-strength two-piece design with minimal moving parts for maximum reliability. The steel-reinforced, elastomer-bonded annular seal is built to withstand extreme temperature fluctuations, ensuring consistent performance in the harshest environments.

• Manufacturer Part Number: RD208
• Axle Spline Count: 26
• Ring Gear Bolts: 10
• Engagement: Instant pneumatic locking and unlocking
• Materials: Durable two-piece steel construction
• Included Hardware: Air Locker differential, activation switch, solenoid valve, air line, and bulkhead fitting
• Note: Requires an onboard air compressor for operation (sold separately)

Fits 2007-2017 Jeep Wrangler and Wrangler Unlimited (JK) models equipped with a 30-spline Dana 44 rear axle.

The Yukon Gear Grizzly Locker is a mechanical positive-locking differential engineered for the most demanding off-road environments, including rock crawling, trail running, and racing. This patented design delivers 100% power to both tires for maximum traction while allowing the unit to disengage automatically during turns for improved drivability on the street.

Built for extreme durability, the Grizzly Locker features 8620 steel internal gears and an innovative clutch tooth design. The teeth are engineered with a larger radius at the base, providing up to 350% greater strength compared to traditional back-cut designs. This added material helps the locker resist catastrophic failure during shock-loading or axle breakage.

• Internal components forged from high-strength 8620 steel
• Patented internal design reduces common locker failures
• Engineered to resist breakage from shock-loading
• Provides 100% power to both wheels simultaneously
• Automatic disengagement for cornering maneuvers
• Assembled in the USA
• Manufacturer Part Number: YGLD44-3-30-JK
• Fitment: 30-spline Dana 44 housings

Fits 2013-2017 Toyota 86, Subaru BRZ, and Scion FR-S models.

The OS Giken Super Lock LSD (TY421-HA) is a high-performance mechanical limited-slip differential engineered for maximum traction and predictable handling. Unlike traditional LSDs that use high initial torque, the Super Lock design utilizes a high number of friction plates to ensure smooth, progressive engagement while providing a complete lock-up under load. This design minimizes chatter and provides superior cornering stability, whether you are on the street or at the track.

• High-capacity friction plate design for smooth, total lock-up
• Improves corner exit speeds and overall vehicle control
• Precision-engineered for durability under high-stress conditions
• Retains street-friendly drivability with minimal noise and vibration
• Direct replacement for the factory differential unit
• Manufacturer Part Number: TY421-HA

Fits select 1968-2016 Ford Bronco, F-150, and E-Series; Jeep CJ5, CJ7, Cherokee, Grand Cherokee, and Wagoneer; International Scout II; and Isuzu Rodeo models equipped with a Dana 44 rear axle.

The Eaton Detroit Truetrac is a helical-gear style, limited-slip differential (LSD) designed to maximize wheel traction without the maintenance requirements of traditional clutch-style units. Its sophisticated gear-driven design automatically transfers torque to the wheel with the most grip, providing smooth and quiet operation during both forward and reverse maneuvers. Because it uses no clutches or friction plates, the Truetrac is essentially maintenance-free and does not require special lubrication or friction modifiers.

• Axle Fitment: Rear Dana 44 with 30-spline axle shafts (1.31-inch diameter)
• Gear Ratio: Compatible with 3.73 and numerically lower gear ratios
• Design: Helical gear limited-slip (clutchless)
• Operation: Automatic engagement with optimized torque bias for maximum acceleration and handling
• Durability: Forged steel housing and high-strength internal gears for long service life
• Manufacturer Part Number: 913A589

Fits select 1953-2002 Chevrolet, Dodge, Ford, GMC, and Jeep models with Dana 44 axles (5.9L).

The Yukon Grizzly Locker is a heavy-duty mechanical positive-locking differential engineered for maximum traction in rock crawling, off-road racing, and drag racing environments. This unit delivers 100% power to both drive wheels while maintaining the ability to disengage for smooth cornering. Its patented internal design specifically addresses common locker failures through reinforced geometry and superior materials.

Construction features high-strength 8620 steel internals and a patented tooth design. The inner clutch teeth are engineered with a larger radius at the base, offering up to 350% greater strength than standard back-cut designs to better resist shock-loading and axle failure. This unit is designed for 30-spline axles and is compatible only with 3.92 and numerically higher gear ratios.

• Manufacturer Part Number: YGLD44-4-30
• Fits Dana Spicer 44 axle housings
• 30-spline axle compatibility
• Designed for 3.92 and up gear ratios
• High-strength 8620 steel internal components
• Patented design reduces internal component failure
• Assembled in the USA

Fits select 1967-2025 Chevrolet and GMC C20, C30, K20, K30, 2500, and 3500 series trucks and vans with the 10.5-inch GM 14-bolt rear axle.

The Yukon Dura Grip is a high-performance positraction limited slip differential designed to provide smooth yet aggressive traction. Engineered for versatility across various terrains, this LSD utilizes a four-pinion design to distribute torque effectively while maintaining streetable manners. The unit is fully rebuildable, ensuring a long service life even in demanding truck and towing applications.

• Carrier Fitment: Fits 4.10 and numerically lower gear ratios (also compatible with thick gears)
• Axle Spline: 30-spline
• Spider Gears: Forged 4320 chromoly for maximum internal strength
• Case Material: High-strength nodular iron
• Clutch Design: Raybestos composite clutches for consistent lockup and durability
• Design: Internal 4-pinion configuration for increased load capacity
• MPN: YDGGM14T-3-30-1

Proudly assembled in the USA, every Dura Grip unit undergoes extensive testing and utilizes state-of-the-art software design to ensure precise tolerances and reliable performance under load.