The original gearbox mounts fitted to these cars feature heavy voiding and as a result allow the engine and gearbox to move excessively under acceleration and gear changes. Filling these voids with a polyurethane insert is a quick, easy and reversible way to improve throttle response and gear changes by providing additional engine stability to restrict movement at higher torque levels without the increased NVH associated with more expensive full replacement aftermarket mounts. Fits Mini Gen 1 Cooper S & JCW only.
