B&B Performance Exhaust - Audi S4 4.2L V8 (B6) - "Stealth" Version

For more information about this product, visit: http://uspmotorsports.com/B-BExhaust-BillyBoat-ExhaustSystem-B6S4-.html This video shows the "Stealth" version of the B&B (Billy Boat) Performance Exhaust system for the Audi 4.2L V8 S4. "Sport" version available to replace center muffler w/ x-pipe for more sound & more power.

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