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When high torque loads and aggressive corner exits push your chassis to the limit, stock differential mounts quickly become the weak link. The ECS Tuning Rear Differential Front Mount Upgrade Kit is track-engineered to lock down your rear diff, control axle wrap, and ensure immediate power delivery to the pavement.
Built to withstand severe track abuse, this kit eliminates hardware failure by replacing the undersized factory M12 bolt with an ultra-high-tensile Grade 12.9 M14x1.5 bolt. Surrounding the upgraded hardware is a track-spec 95A durometer red polyurethane bushing and a rugged 6061-T6 aluminum sleeve finished in Type II black anodizing. Engineered for maximum drivetrain stiffness, this upgrade ensures your differential stays precisely aligned under the harshest motorsport conditions.
Experience effortless caster adjustment with KMAC's premium inner thrust arm bushings.
Key Features:
1. Patented Design: Enjoy precise adjustments with a single wrench, even under load directly on the alignment rack.
2. Simplified Adjustment: Say goodbye to inaccurate multi-bolt systems and time-consuming disassembly for readjustments.
3. Extensive Adjustment Range: Benefit from the largest and strongest adjustment range available.
4. Mono Ball/Dual-Axis Bushings
5. Enhance brake and steering response with these high-performance bushings.
6. Superior Design: Our unique design surpasses traditional steel spherical bearings, offering over 2 ½ times the load-bearing and impact area.
Upgrade your vehicle's handling and responsiveness with KMAC's innovative inner thrust arm bushings.
This product was last offered at the strikethrough price on
10-21-2026
This product was last offered at the strikethrough price on
10-21-2026
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
09-04-2026
This product was last offered at the strikethrough price on
09-04-2026
This product was last offered at the strikethrough price on
10-21-2026
This product was last offered at the strikethrough price on
10-21-2026
This product was last offered at the strikethrough price on
06-14-2026
This product was last offered at the strikethrough price on
06-14-2026
This product was last offered at the strikethrough price on
06-14-2026
This product was last offered at the strikethrough price on
06-14-2026
This product was last offered at the strikethrough price on
06-14-2026
This product was last offered at the strikethrough price on
06-14-2026
This product was last offered at the strikethrough price on
08-12-2026
This product was last offered at the strikethrough price on
10-08-2026
This product was last offered at the strikethrough price on
10-08-2026
Want the best performance option in shock tower mounts? IRP has created their pillow-ball rear shock mounts for just this need. These rear shock mounts are designed for use on the track and racing. This set of mounts will help your rear shocks perform the best they can in all conditions. The advantage to using a mount with spherical bearing is that it allows the shock to freely move off axis without side loading the shock shaft like rubber or polyurethane mounts do. Side loading a shock increases stiction and wear which decreases its efficiency. Because these are mounts without an isolator (rubber or polyurethane) to dampen road noise and vibrations we do not recommend them for street cars.
The bearing sleeve and poly bushing are built to work with all stock style shocks such as Bilstein and H&R coilover and suspension kits.
Fits the following BMW chassis:
E36 BMW All Submodels except for 318ti
E46 BMW All Submodels
E30 BMW All Submodels
E36 Z3 BMW All Submodels
E85/E86 Z4 BMW All Submodels
This product was last offered at the strikethrough price on
10-08-2026
This product was last offered at the strikethrough price on
10-08-2026
This product was last offered at the strikethrough price on
08-07-2026
This product was last offered at the strikethrough price on
08-07-2026
This product was last offered at the strikethrough price on
06-13-2026
This product was last offered at the strikethrough price on
06-13-2026
For our Grand-Am Cup E46 M3s we wanted a fully solid differential mount setup. The advantages of a fully-solid aluminum set is that they last forever, quickens response in the suspension, and frees up horsepower to the wheels. These fully solid aluminum diff mounts are CNC machined and lightened for a direct replacement of the original rubber pieces.
This product was last offered at the strikethrough price on
06-13-2026
This product was last offered at the strikethrough price on
06-13-2026
Enhance your BMW's handling performance with the BMW E46 M3 Rear Suspension Mount Package - Race Bushings. This package includes race-grade bushings designed specifically for BMW E46 M3 models, offering superior suspension performance and durability. Engineered with precision and quality in mind, this package provides several benefits:
Upgrade your BMW E46 M3's suspension with this high-performance package for an exhilarating driving experience.
This product was last offered at the strikethrough price on
05-12-2026