The Mach Force XP cat-back exhaust system produces 11hp and 10lbs. x ft. of torque for your BMW 335i. This exhaust systems is constructed from 2.75" mandrel bent, 304 hand brushed stainless steel and utilizes a unique crossover pipe that helps to equalize exhaust pressure and tunes the exhaust pulse. The system also comes with dual 3.5" polished 304 stainless steel tips and muffler to build a mellow, yet powerful sound. Note: Cutting is required and should be performed by a skilled technician.