The stock MINI Cooper chassis is set up for general everyday use with an emphasis on comfort. These improved engine bushings with ingenious void inserts reduce the amount of movement by filling in the voids in the mounts with softer compound polyurethane. Limiting engine and transmission movement in the MINI Cooper has many benefits, smoother power transmission to the wheels eliminating the intense wheel hop when spinning the tires, less movement of the shifter cables allowing the transmission gears to stay fully connected, less flex on all connected engine components including the exhaust system. This very kit is used in Grand Am Cup MINI Cooper race car and on or MINI Cooper Challenge car. Kit includes: Lower Engine Mount, Small (x 1) Lower Engine Mount, Large (x 1) Installation instructions Installation time: 1 hour