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The twin-turbo S58 is a quiet engine from the factory by design, and this is XForce's answer: a 3-inch 304 stainless Varex cat-back finishing in quad 4-inch tips.
The Varex valve matters more on a G80 than on most cars, because these are genuinely usable daily drivers that owners do not want droning on a commute. Closed it behaves; open it lets the S58 do what BMW's emissions hardware keeps muted.
Features
- 3-inch 304 stainless steel construction
- Varex valved rear muffler
- Quad 4-inch tip outlets
- Remote valve control
- Direct bolt-on to the factory system
Fitment
BMW M3 G80 and M4 G82, including Competition.
Does not fit: The previous-generation F80 M3 and F82 M4 take XFESBMF80VKCS.
Please note: A valved exhaust is loud with the valve open. Check your local noise regulations before using it that way on the road.