Magnaflow Sport Series SS Cat-Back Exhaust | Audi TT Quattro (08-09) (16994)The MagnaFlow 2008 2009 Audi TT Quattro Sport Series Cat Back Performance Exhaust System enhances your 3. 2L 2008 2009 Audi TT Quattro with an aggressive character that is sure to help you stand out from the other Audi TT Quattro you encounter on the street. With its 2. 5in. diameter fast flowing mandrel bent main piping that passes through 2 Straight Through mufflers before ending in a Dual Split Rear exit with 4in. Polished Welded On Double Wall