APR FE100039 3" Full RSC Exhaust for Audi B8 A4

The APR FE100039 B8 A4 RSC Exhaust is a stainless steel, 3" mandrel bent, turbo-back exhaust. Peak torque is increased by Over 70 lb ft when Compared to APR’s Stage 1 ECU Upgrade and Stock Exhaust! Peak Horsepower is Increased by 29hp when compared to APR’s Stage 1 ECU Upgrade and stock exhaust!

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 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.

3" Design with High Flow Catalytic Converters:
APR's 3 inch downpipe with high flow catalyst for the A4 2.0 TFSI is the first true downpipe for the A4 and the only one that incorporates traditional exhaust performance tuning for the new 2.0 TFSI engine. Other 2.0 TFSI engine applications outside of the A4 chassis have historically enjoyed the following benefits that have never before been made available to A4 owners:

• 3 inch Exhaust Tubing Diameter beginning at the Turbocharger Exit for Maximum Turbocharger Spool and Peak Horsepower
• Turbocharger Boost Onset Reduced by Over 400 rpm’s!
• Relocation of the Catalyst to Reduce Backpressure and Turbulent Airflow at the Turbocharger
• Incorporation of a 200 Cell Count Catalyst to aid in Turbocharger Spool and Remove Restriction
• Considerable Increases in Peak Horsepower, Peak Torque and Fuel Economy

Software requirements:
The APR FE100039 B8 A4 RSC Exhaust flows so well modifications to the ECU software are absolutely required when using the new RSC systems. Spool time is significantly decreased and can result in a rather large overshoot of requested load levels which will cause the throttle to close. This can only be eliminated by properly recalibrating the engine software to match the hardware changes with APR’s Stage 2 ECU Upgrade.