AfE Power 49-46309 Cat-Back Exhaust System +13 HP / +15 lbs. x ft. Torque max gains High flowing muffler delivers a powerful sound Bolt-on installation, no cutting or welding needed We include two OEM BMW gaskets for a flawless seal Fits BMW 325i/ci / 330i/ci (E46) 01-06 L6-2.5/3.0L (M54)