The COBB BMW 3-Series Cat-back Exhaust is designed to fit your 2007-2011 335i Sedan and 2007-2013 335i and 335is Coupe, even if it is All-Wheel Drive! Utilizing a single 3" pipe into a suitcase muffler that then divides the exhaust gases between 2 2.5" pipes to exit your motor. The COBB BMW 3-Series Cat-back Exhaust is unmatched in performance with OEM fitment, innovative engineering and outstanding craftsmanship. Treat your BMW 3-series to a COBB exhaust now! Not compatible with 3-Series Convertible Vehicles. Features: 2.5" & 3" 304 Stainless Steel Construction CNC Mandrel Bent Tubing with TIG Welds Helmholtz Chamber to Reduce Resonance V-Band Clamp Connections for Infinite Adjustability 4" Slip Fit Tips In Order to Customize Tip Placement What's Included: COBB Catback Exhaust