The APR Cast Race DP Exhaust System replaces the restrictive factory catalyst cross pipes and resonators with an upgraded 76mm stainless steel mandrel-bent system, featuring port-matched cast inlets, high-flow catalysts and various other features. Expect better throttle response, more horsepower and an intoxicating exhaust note, while remaining civilized during normal daily driving. It's the best performance upgrade for the 4.0 TFSI following the APR ECU Upgrade and it's all designed and assembled in-house, using premium materials and world-class manufacturing techniques few can match.
The factory downpipes are less than desirable from a performance standpoint. Both pipes quickly neck down from the massive turbocharger outlet to small and resistive 60mm pipes that are kinked in many areas before twisting and dumping into catalytic converters. APR greatly improved upon this design through the use of investment-cast and port-matched downpipe inlets. Each pipe gradually reduces to the larger and straighter 76mm piping, with the hot catalyst moved further down the exhaust stream to keep under hood temperature down. The photos below show illustrate the differences between the factory and APR exhaust system inlets.
The cast inlets, piping and other components are made from the the high-nickel content, premium-grade stainless steel known as T304L. This material was chosen for its excellent corrosion resistance, strength and appearance. The castings are tumbled to smooth and de-burr any imperfections, and all piping is brushed clean before entering the CNC controlled mandrel benders. TIG welding is used at all connection points, and was chosen for its strength and appearance. Each weld is argon back purged during assembly to increase strength and consistency of the welds. The gusseted brackets are CNC laser cut and bent to provide strong mounting points to the factory mounting hardware.
The Audi S8’s factory catback exhaust system is located in a slightly different location compared to other models. As such, the APR Adapter is required for proper fitment with the factory catback exhaust. The fit kit consists of two OEM clamps and extension pipes. The system bolts directly between the APR Race DPs and factory catback pipes.
NOTICE: THIS MOTORSPORT/RACING PRODUCT IS NOT DESIGNED TO MEET ANY FEDERAL EMISSIONS STANDARDS IN THE USA AND IS NOT FOR STREET OR HIGHWAY USE. THIS PRODUCT IS NOT C.A.R.B. COMPLIANT AND IS NOT FOR SALE OR USE IN CALIFORNIA, USA. APR MAKES NO CLAIMS THIS PRODUCT COMPLIES WITH ANY EMISSION LAWS IN ANY JURISDICTION. IT IS ENTIERLY THE RESPONSIBILITY OF THE PURCHASER TO INFORM THEMSELVES OF ANY LAWS OR REGULATIONS WHICH MAY PROHIBIT USE OF THIS PRODUCT.
This product fits the following vehicle configurations:
|Audi||RS6||4.0 TFSI||Quattro - LHD|
|Audi||RS7||4.0 TFSI||Quattro - LHD|
|Audi||S6||4.0 TFSI||Quattro - LHD|
|Audi||S7||4.0 TFSI||Quattro - LHD|
|Audi||S8||4.0 TFSI||Quattro - LHD|
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