Developed for the BMW E46 330, this Billy Boat Performance Exhaust axle back exhaust is precision crafted using 100% T304 stainless steel. Through a combination of sound cancelation and absorption the straight through design muffler offers a deep rich exhaust note on acceleration with a mild tone at idle and cruising speeds. This along with CNC mandrel bent tubing allows for a smooth uninterrupted exhaust flow for increased horsepower and torque. While a simple cut is required to remove the stock muffler the B&B system mounts in the factory hangers for an easy do it yourself installation. Twin 3” round rolled edge tips gives the car an individual look. No engine management sensors are moved or altered therefore this system is 50 state emissions legal and is backed with their limited LIFETIME warranty.