APR Audi B5 S4 2.7T RSC™ Performance Exhaust System

APR's RSC™ technology is now available in the 2.7T RSC™ Performance Exhaust System. Reflective Sound Cancellation allows for maximum exhaust gas flow while completely eliminating in cabin sound resonance (drone). RSC™ incorporates innovative technologies developed in conjunction with NASA. With limited use of packing materials and no baffles, RSC™ allows for a completely straight and free flowing exhaust path through the RSC™ mufflers. Reflective Sound Cancellation bounces the undesirable sound waves into each other to attenuate the wave and completely eliminate the low frequency tones that create drone. Each RSC™ muffler is tuned to eliminate specific, undesirable sound frequencies allowing only the engine's desirable exhaust notes to be heard and improving performance.

APR's design specifications and manufacturing requirements result in a Twin 2.5" to 3" mandrel bend stainless steel performance exhaust system unmatched by any other. RSC™ technology ensures the maximum possible performance increases from any performance exhaust system while maintaining refined and unobtrusive sound inside the cabin.

APR's RSC™ catback exhaust system has the same flow capabilities as a large straight pipe exhaust system flow tested and certified capable of supporting 1100BHP. APR's new RSC™ catback exhaust system is the perfect solution for those of you with 500+ AWHP that want quiet, unobtrusive cabin sound levels but a mean growl at wide open throttle.


APR's 2.7T RSC™ Performance Exhaust System features the same great designs from APR's Engineering Team and high quality manufacturing incorporating the following:

  • Stainless Steel Construction
  • CNC Milled Mounting Bracketry
  • High Quality Band Clamps
  • CNC Mandrel Bent Tubing
  • Double Walled and Rolled Tips Emblazoned with the APR Tuned Logo
  • Twin 2.5" to 3" Tubing Diameter
  • Dual 3" Polished Stainless Steel Exhaust Tips
  • Lifetime Warranty

For over a decade APR's delivered Performance Without Compromise and our new RSC™ catback exhaust system accomplishes exactly that! Bring the big power S4's off the trailers and out of the garages and make them your daily driver once again!

APR RSC™ Chamber Cutaway View

RSC Technology

Full Catback System

Catback System
RSC Rear Chamber and Exhaust Tips RSC Rear Chamber and Exhaust Tips Exhaust Tips Exhaust Tips Exhaust Tips RSC Chamber RSC Chamber Exhaust Piping Exhaust Piping Y Pipe Welds Welds

Exhaust Video

Exhaust System Application Guide
System Vehicle Engine Transmission Part Number Price  
RSC Catback Exhaust System B5 S4 2.7T 6MT & Tiptronic CB100008Please Call 
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Phone: (800) 680-7921 Local Phone: +1 (334) 502-5181 Fax: (334) 502-5180 Address: APR LLC, 4800 US HWY 280 West, Opelika, AL 36801

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