Description
GMG Exhaust 3.5” For Audi B5 S4 2.7t
The
GMG Exhaust 3.5”
for the
Audi B5 S4 2.7t
is a performance-oriented, T304 stainless steel exhaust system that is still available from certain specialized retailers. It is designed to fit the B5 S4 and is often used in performance builds.
Key Details & Features
The
GMG World Challenge Sport Exhaust
for the B5 S4 is a single-muffler system known for its robust construction and performance focus.
- Material: The system is hand-built in California using T304 stainless steel and features Tig welding.
- Diameter: It features a 3.5-inch diameter pipe, which is a larger diameter than many stock or standard aftermarket options and is well-suited for high-horsepower applications, including Stage 3 and beyond tunes.
- Downpipes: The exhaust is designed to connect to various downpipes, including stock, 485 downpipes, or other aftermarket options. It was also offered with matching 3-inch downpipes as a complete turbo-back system.
- Design: It is a single-muffler system (though it can be made without one) and uses dual-wall tips.
- Sound: Reviewers have noted that large-diameter exhausts on the B5 S4 can be aggressive sounding but are livable for daily driving, with a noticeable performance improvement at higher power levels.






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