The Sport Series Stainless Exhaust System delivers maximum performance, reduced mass and an aggressive exhaust sound. (check local noise regs/laws) Fitment Information BMW M3 Base L6 3.2L (2001, 2002, 2003, 2004, 2005, 2006) Specs & Features 2.5" Catback Exhaust Series: Sport  Sound Level Exterior: Aggressive Sound Level Interior: Moderate Exit Style: Quad Split Rear Muffler Type: Straight-Through Increases horsepower and torque Made from quality 409 stainless steel Made in the USA Lifetime construction warranty Product Description The Magnaflow exhaust has been build to perform.  With each Magnaflow exhaust, you get years of experience with a company that has been known to produce some of the best sounding and highest horsepower producing exhausts on the market.  Each Magnaflow exhaust is built to fit to your specific vehicle, and deliver the best exhaust flow with the least amount of flow resistance to create the best and most usable power band.  Magnaflow uses their incredible mufflers to give your vehicle a unique sound that is smooth, deep and powerful.  Magnaflow Exhaust Features 100% Stainless Steel with Smooth Mandrel Bends Lifetime Warranty From Magnaflow Dyno Tested and Proven to Make Power Has Legendary Magnaflow Smooth and Deep Exhaust Tone Easy to Install, Built to Last, Includes all Hardware Redline360 is an authorized Magnaflow Dealer.