Fast Intentions is proud to present our B7 S4 Cat Back Exhaust System.

This Cat Back exhaust system is the premier upgrade for all S4 owners looking to maximize the performance from their 4.2L FSI V8 engine. Our exhaust system will enhance the sound that Audi created from the factory by making it smoother, deeper, and louder.

Built as a direct OEM replacement, our exhaust system is easy to install with simple hand tools; no cutting or welding required. Our X Pipe is designed to increase low end torque and maximize power throughout the entire RPM band. The exhaust system is unobtrusive at idle and cruising speeds; but comes to life at wide open throttle. Our exhaust system gives your Audi S4 that exotic sound associated with European sports cars. With the addition of our exhaust system, you will improve the aesthetics of your vehicle with its sporty and classy appearance.

PRODUCT INFO

• Direct OEM replacement: no cutting or welding required.
• 2.5" T-304 mandrel bent stainless steel tubing.
• 5" x 9" oval, 12" long polished stainless steel perforated core mufflers.
• 76mm dual wall, resonated, polished stainless steel exhaust tips.
• Non resonated or 14" stainless steel perforated core resonators within the X Pipe. Resonators reduce interior noise without affecting performance.
• Standard 2.50" connection on the front of our X Pipe which bolts directly to our downpipes with NO neck down.
• Optional 55mm adapters & clamps for connection to stock downpipes.
• Limited 3-year warranty on all welds, craftsmanship, mufflers and tips.
• Application Specific: 2005.5-2009 Audi S4
• All installation hardware included.
• Hand built in the USA.

BENEFITS

• Improved exhaust flow and throttle response.
• Refining the factory exhaust note by increasing depth and volume.
• Reduction in EGT's (Exhaust Gas Temperature) by freeing up back pressure.

ADDITIONAL INFO

• This product is hand built (in house) to order with a standard lead time of 12 - 14 weeks. Once your order is placed, you will receive an invoice with your estimated shipping date. Note: The lead time may fluctuate less than 12 or greater than 14 weeks based on order volume.
• California customers are subject to sales tax.
• Customers outside the continental U.S. are subject to additional shipping charges.
• Image(s) shown may not reflect actual product.