These are Gargistic's original poly rear subframe bushings and are modified replacements that will not only reduce play in the rear suspension components substantially compared to the old and mushy OEM rubber bushings, but the "raised" design will move the subframe up 12mm to help correct some of the unwanted camber and toe that comes from lowering an E30. This has a similar effect to raising the suspension so the rear geometry resembles that of a stock height E30. The 12mm raised bushing's average geometry correction (camber and toe) is from -5 degrees to -1.5 degrees depending on your suspension setup. These bushings are slightly stiffer than the OEM units which will cause a tiny bit more NVH to be transferred through the chassis, but the benefits greatly outweigh the small sacrifice in comfort. 80A is the softest poly bushing in Garagistic's lineup and are perfect for a street performance E30 that will see the occasional autocross or track day. We highly recommend professional installation as these will require a press to install as well as remove your old bushings NOTE: When installing Garagistic raised subframe bushings, the differential mount will no longer line up with the mounting provision on the chassis, but there are a couple of solutions for this! The first option is to install extended studs and spacers onto the differential. This will effectively space the differential back down 12mm from the raised subframe back into the factory position. This will allow the use of a standard centered differential bushing and maintains the factory driveline geometry. The second option is to simply run an offset differential bushing. This will allow the differential to be mounted to the subframe in the factory orientation and the repositioned hole in the differential bushing to line up with the factory bracket. This will change the driveline geometry in the rear! Garagistic have used both methods with success on street and track applications. Includes: 2 Raised E30 Rear Subframe Bushings 2 Inner Races Lifetime Warranty! Compatibility: Fits BMW 3 Series E30 (318, 323, 325 & M3) - DOES NOT FIT iX models Replaces OEM Part Number 33311129144 (33-31-1-129-144)
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The subframe provides mounting for your rear suspension. The subframe connects to the body with bushings to absorb vibration at all mounting locations. These bushings absorb any vibration that would normally be transmitted to the cabin and keep the subframe solid. They also provide a solid mounting location to keep everything tight.
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