This system produced gains of up to +18 HP and +27 lbs. x Ft. TQ., as measured on our in-house dyno. This cat-back exhaust system is constructed of 3" - 2-1/2" mandrel-bent 304 stainless steel tubing...

Performance Gains: This system produced gains of up to +11 HP and +15 lbs. x Ft. TQ., as measured on our in-house dyno. 3" - 2-1/2" 304 Stainless Steel Construction: This axle-back exhaust system is...

MACH Force-Xp 3 IN to 2-1/2 IN Stainless Steel Cat-Back Exhaust System Polished Audi S3 (8V) 15-20 L4-2.0L (t) Audi S3 (8V) 15-20 L4-2.0L (t) Fitment: 2015 Audi S3 Premium Plus 2015 Audi S3...

Performance Gains: This system produced gains of up to +18 HP and +27 lbs. x Ft. TQ., as measured on our in-house dyno. 3" - 2-1/2" 304 Stainless Steel Construction: This cat-back exhaust system is...