GPF-back Exhaust - EC Approved [Mk4 Focus ST]

The new mountune EC Approved GPF-back exhaust for the Mk4 Focus ST unlocks a more purposeful soundtrack from the 2.3-litre EcoBoost, while reducing back-pressure and enhancing the overall aesthetic of the vehicle.

Constructed from 76mm (3”) 304 stainless steel, the mountune GPF-back system improves vehicle performance, particularly when power output has been increased, thanks to its low back-pressure design. The carefully engineered muffler ensures the system remains free from intrusive cabin boom, delivering a sporty yet refined exhaust note.

The exhaust is fully EC approved, meaning it meets strict European standards for road use, offering performance and sound without compromising compliance.

Please note: the EC Approved system will only currently fit with a stock GPF