APR Tuned Stainless Steel Stealth Catback Exhaust Audi S4 B5 00-02

APR's S4 Exhaust is a stainless steel, mandrel bent, cat-back exhaust. The exhaust begins after the two lower factory catalytic converters and is two 2.25" pipes that merge into one 3" pipe. The Stealth exhaust helps to maintain the S4's subdued character. While louder than stock, it is not too loud to attract attention. With TIG welding, fully stainless construction, and CNC'ed hangers, you will not find a higher quality system on the market.