New rear subframe bushings can make your BMW feel a lot more planted, especially in high power builds. Upgrading to poly or solid will lessen deflection, making you feel more connected to the road and giving you, the BMW enthusiast, a more refined driving experience.
The 034Motorsport Billet Aluminum Rear Subframe Insert Kit for the BMW F2x/F3x chassis is designed to limit movement in the factory rear subframe mounts to maintain proper suspension geometry when cornering, and improve the responsiveness of the rear suspension and differential. By filling small voids in the four factory mounts as well as limiting vertical movement, this insert set eliminates the associated slop to ensure that you experience a more refined, connected driving experience, especially when driving at the limit. These billet aluminum parts will not pack and wear over time and offer a lasting performance improvement. The BMW F2x/F3x chassis use rubber rear subframe mounts that deflect under load, causing the rear end to feel vague and loose, as well as leading to less-than-optimal suspension geometry and increased understeer. These precision-machined billet aluminum inserts are designed to fill voids in the factory rear subframe mounts, and limit subframe movement without sacrificing ride quality or introducing any perceivable additional noise, vibration, or harshness into the cabin. The result is a more refined, connected driving experience, as well as improved effectiveness of aftermarket rear sway bar upgrades and suspension components. Designed to work in conjunction with the factory rubber mounts, this insert package was engineered using CAD software and thoroughly tested and refined to provide a significant improvement in handling performance and feel. These inserts were tested extensively by 034Motorsport and independent BMW enthusiasts before release on multiple F2x/F3x vehicles. Installation is very simple, can be performed in under an hour, and is completely reversible. Kit includes: (2) Upper Front Inserts (2) Upper Rear Inserts (2) Lower Front Inserts (2) Lower Rear Inserts FEATURES: 6061 Billet Aluminum Construction CNC-Machined Clear Anodized Finish for Durability Engineered to Fill Voids In Factory Rear Subframe Mounts Helps Maintain Proper Suspension Geometry When Cornering Reduces Rear Subframe Movement During Launches & Acceleration Improves Shifting Feel, Resulting in Crisper Shifts Virtually No Additional NVH Transfer Inside Cabin Easy, Straightforward Installation
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The BMW F2X/F3X Chassis uses rubber differential mounts that deflect under load, causing the delay of power transfer to the rear tires, as well as leading to less-than-optimal handling characteristics during on-throttle and off-throttle transitions. These precision-machined billet aluminum inserts are designed to fill voids in the factory rear differential mounts, and limit differential movement under load without sacrificing ride quality or introducing any perceivable additional noise, vibration, or harshness into the cabin. The result is a more refined, connected driving experience. Designed to work in conjunction with the factory rubber mounts, this insert package was engineered using CAD software and thoroughly tested and refined to provide a significant improvement in handling performance and feel. These inserts were tested extensively on 034Motorsport's in-house F30 BMW 340i Development Vehicle before release. Installation is very simple and is completely reversible. FEATURES: CNC-Machined Billet 6061 Aluminum Construction with Clear Anodized Finish Application-Specific Design for Optimal Fitment and Performance Engineered to Fill Voids in Factory Differential Mount Bushings Reduces Rear Differential Movement During Shifting, Acceleration, and Deceleration Virtually No Additional NVH Transfer Inside Cabin Straightforward Installation WHAT’S INCLUDED: (Qty. 2) Front Bushing Inserts (Qty. 1) Rear Bushing Insert (Qty. 1) Insert Washer PART NUMBER EXCHANGE: Front Bushing: 33 31 6 792 513 (33316792513) Rear Bushing: 33 31 6 880 637 (33316880637)
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034Motorsport is pleased to present Billet Aluminum Rear Subframe Mount Inserts for E9X BMW models! E9X BMWs use rubber rear subframe mounts which deflect under load, causing the rear end to feel vague and loose, as well as leading to less-than-optimal suspension geometry and increased understeer. These precision-machined billet aluminum inserts are designed to fill voids in the factory rear subframe mounts, and limit subframe movement without sacrificing ride quality or introducing any perceivable additional noise, vibration, or harshness into the cabin. The result is a more refined, connected driving experience, as well as improved effectiveness of aftermarket rear sway bar upgrades and suspension components.
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The subframe and differential mounting point is the heart of the rear suspension in an E34. When they move, so do all of the rear suspension mounting points. Replacing the stock rubber subframe and differential bushings with UHMW will limit drivetrain and suspension movement and keep your car’s suspension geometry the way it’s supposed to be. They will last longer than the original rubber and do not 'wind up' under load/unload, transferring more power through the axles to the wheels. Recommended for street or race use. Set of 2 subframe bushings.
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The E82 and E90/E92 subframes have an inherent weakness in the rear subframe - the mounts are too soft for the power and torque these cars are capable of. The subframe is the heart of a BMW's rear suspension. As torque is transmitted through the differential and axles and as the tires grip the road, the subframe mounts are working to keeping everything in line. That's a tough task to hold when torque is increased with bigger boost (335i) or even mild tweaks (M3). While the M3 subframe mounts are a great upgrade for the non-M chassis these factory BMW Motorsport subframe mounts go one step further.
These Motorsport/Group N rear subframe bushings are a direct replacement upgrade over the stock mounts. They are rubber to conform to the rules of the Group N racing class - so they are still acceptable for street use as long as extra ride harshness can be tolerated. The rear subframe has to come down from the car for these mounts to be pressed in. So now is the perfect time to do other work as well - check out our other Motorsport Race bushings or M3 upgrades.
Price is for the set of 4 mounts.
This item fits the following BMWs: 2008-2012 E82 BMW 128i 135i 1M Coupe 2006-2011 E90 BMW 325i 325xi 328i 328xi 328i xDrive 330i 330xi 335d 335i 335xi 335i xDrive M3 - Sedan 2006-2012 E91 BMW 325xi 328i 328xi 328i xDrive - Wagon 2007-2013 E92 BMW 328i 328xi 328i xDrive 335i 335is 335xi 335i xDrive M3 - Coupe 2007-2013 E93 BMW 328i 335i M3 - Convertible Show More Show Less
