APR Tuned Stainless Steel SRT 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 SRT exhaust replaces the center muffler with a special side resonator. This exhaust has a more aggressive sound and a distinctive note. With TIG welding, fully stainless construction, and CNC'ed hangers, you will not find a higher quality system on the market.