GPF-back Exhaust [Mk4 Focus ST-Line] fitted-golf75gti whilst the carefully engineered internal

whilst the carefully engineered internal muffler ensures this system remains free from intrusive cabin boom

Please note: Revised engine calibration will be required for optimal performance and your vehicle may emit the EML without it (our m380 / m400 calibrations both support this)

plus it adds an aesthetic boost to your engine bay

The mountune Racing “M” badge is incorporated into the leading edge for added style

Zip-up mountune case

GPF-back Exhaust [Mk4 Focus ST-Line] fitted-golf75gti whilst the carefully engineered internalThe mountune GPF back exhaust for the Mk4 Focus ST Line adds a noteworthy boost to audible performance, reduces back pressure and enhances vehicle aesthetics. Constructed from 304 stainless steel, the 3" bore system improves vehicle performance particularly once power output has been raised, thanks to the low back pressure design, whilst the carefully engineered internal muffler ensures this system remains free from intrusive cabin boom, whilst