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GMG introduces its WC (World Challenge) sport exhaust system for 2007+ B7 RS4 owners. The GMG WC RS4 systems offers the discriminating RS4 owner the performance, power and sound worthy of the high revving RS4 engine. Designed, tuned and built in California to GMG's stringent standards. The cat back system is 100% emissions legal and is a direct bolt on replacement for the factory system. Made of T304 Stainless steel throughout (all tubing, inner core and wool packing are stainless, most other brands do not offer this) the system is 20 Pounds lighter than the factory system, offers two larger GMG specific tips, and a center sport resonator which eliminates unwanted cabin resonance. The proprietary cross over center section not only offers additional power by balancing exhaust gas pulse coming from the engine but also adds to the unique sound that only the GMG WC system can offer.
Systems come fully polished and are a direct bolt on replacement utilizing your existing factory down pipe to exhaust clamps ensure no exhaust leaks.
Fitment: 2007 B7 RS4 models USA and world wide models only. Does not fit B7 S4, GMG B7 WC S4 system coming soon.
Customer Testimonial
" There is no highway drone with the GMG exhaust. In low RPM's, it has a nice loud growl, but in the higher RPM range, it quiets down quite a bit, unless you are going at full throttle. Oh, and the sound when you lift off the throttle, it is amazing. It really is the ideal exhaust for a daily driver, loud around town and quiet on the highway. Looks great thermal coated too! Highly recommended!" Member - 6speedonline.com
"GMG installed one of their first units on my RS4. I've had about 15K miles on it. It is significantly louder than stock in sport mode but not any louder than the Milltek resonated exhaust. The tone is much deeper and better than both stock and the Milltek. It is loudest between 2k and 3k but no drone. At higher RPMs the exhaust does not drown out the sound of the big V8. The burble when you let off the throttle is one of the best sounds the exhaust makes." Member - 6speedonline.com
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