The COBB Cat-Back Exhaust System for the Mk7.5 GTI is a direct replacement for the factory exhaust. It comes with an adapter that tapers down to be used with the factory downpipe or can be used without the adapter and bolted directly to the COBB 3" downpipe. Engine resonance and turbo noises are amplified but still kept in check through the 18" resonator and 12" COBB stamped muffler. Aesthetics are improved from the rear of the vehicle with dual-walled 4" tips featuring the COBB logo. Ditch the power robbing factory cat-back and utilize the COBB Cat-Back system that boasts 304 stainless steel construction, a COBB stamped muffler, and 4" dual-walled tips featuring the COBB logo. As a direct factory replacement with no tuning required, it's a simple way to improve the looks and sound of your Mk7.5 GTI!