Billy Boat Catback Exhaust for 2005-08 Audi A4 & S4 [B7]

In true Billy Boat Performance Exhaust fashion, B&B has expanded their already large Audi line with the addition of a newly designed system for the all new Audi A4. Manufactured using only the highest grade T304 stainless steel materials available the full 2-1/2” system is a direct replacement for the restrictive factory system providing increases in both horsepower and torque. Hand fabricated mufflers incorporating B&B’s unique Purge Resonance Technology (PRT) give the A4 a distinct exhaust note that is louder than the stock yet pleasing to the ear. Billy Boat Performance Exhaust offers a touring system or a sport version that replaces the center resonator with a hand fabricated x-pipe for the owner that is looking for a louder, more aggressive note. To finish the system off B&B uses a twin tip design using 3.5” round double wall tips for a look that is pleasing to any enthusiast’s eye. With the system being an after cat design it is 50 state emissions legal and is backed by B&B’s limited LIFETIME WARRANTY!

Benefits: Limited lifetime warranty Guaranteed to produce huge HP and TQ gains Fully polished mandrel bent SS tubing Increase in fuel mileage No interior resonance Incredibly deep rumble Designed to fit perfectly All bolt on Hand Fabricated Mufflers Twin polished tips