The 2006 BMW M Coupe’s steering is also donated by the M3, replacing the Z4’s standard electrically-assisted power rack-and-pinion setup with an engine-speed sensitive hydraulic assist unit equipped with a special power steering fluid pump. The result is greater steering effort at low speeds in trade for the kind of sharpened road feel and response at higher speeds for which BMWs are known, and loved. Brakes are compound, cross-drilled, ventilated discs with brake drying, ABS, Dynamic Brake Control, start-off assistant, electronic brake proportioning, and cornering stability enhancement. The compound, two-piece rotor design cuts unsprung weight and reduces warping under high-pressure, high-heat conditions, translating to a reduction in vibration when running the M Coupe hard. The whole shebang rides on M Double Spoke 18-inch wheels wearing summer-spec 225/45ZR front tires and 255/40ZR rear treads.