APR's Golf/GTI catback exhaust is a stainless steel, mandrel bent system. This exhaust begins after the factory catalytic converter with a with a 3" center pipe which contains a small 4" resonator. The 3" pipe continues back to the muffler and a single angle cut tip. With TIG welding, fully stainless construction, and CNC'ed hangers, you will not find a higher quality system on the market.