aFe MACH Force-Xp 3" to 2.5" 304 Stainless Steel Axle-Back Exhaust System (4.5" tips) - MK7.5 GTISimply swap out the rear section of your GTI's exhaust with this muffler delete to add a custom look, better performance, and a more aggressive tone. Features: Dyno Proven Gains up to +9 HP and +12 Lbs. x Ft. TQ Dual 4. 5" Diameter Exhaust Tips Exhaust Tips Available In Black, Carbon Fiber, or Polished (please select below) MIG Welded Must Cut OE Exhaust What's Included: aFe MACH Force Xp 3" to 2. 5" 304 Stainless Steel Axle Back Exhaust System