APR Tuned Stainless Steel Full Exhaust System Audi S4 B6 4.2L Tiptronic 04-05
This Full exhaust system is a complete stainless steel, mandrel bent, exhaust. The exhaust is a dual 2.25" system that continues to an innovative center muffler. The exhaust then splits and each mandrel bent pipes goes to its own muffler with a 3.5" (90mm) bevel-cut, round tip.
This exhaust is very quiet and simply changes the tone of the exhaust to a deep, unobtrusive sound. With TIG welding, fully stainless construction, and CNC'ed hangers, you will not find a higher quality system on the market.
A set of downpipes is also included. This system replaces the 4-cat factory setup with a pair of metal matrix catalysts. APR downpipes will only fit with an APR catback system. In testing, a full APR exhaust produces gains of 25hp and 35lb-ft across most of the engine powerband. Throttle response is also greatly improved.
About Manufacture: APR Tuned APR LLC is an automotive engineering firm operating a 36,000 sq. ft. performance campus in Opelika, AL. APR was founded in 1997 with a corporate philosophy of Integrity, Excellence and Innovation. APR's Sole Mission is to provide the highest quality and most highly engineered aftermarket performance products available for Porsche, Audi and Volkswagen vehicles.
APR, Enhancing the Driving Experience with No Compromise.
