Motorsportgruppe&reg; Black Anodized Aluminum BMW Rear Shock Tower Reinforcement Kit Plates for E30 E36 E46 Z3 Z4 Kit includes two pieces Laser CNC Cut 6061 Aerospace Grade Anodized Aluminum Prevents costly repairs to your shock towers Can be bolted in minutes Fits E30 / E36 / E46 / Z3 / Z4