Fantastic product, I've gone all out mountune on my Fiesta, so this had to be the one for me. Had it fitted by FJRS and I'm really happy with it. Not offensively loud as reviewed, although I was hoping it might have been a tad louder, so other brands might be worth considering if purely looking for noise. But having waited for mountune to develop this exhaust since the Fiesta ST release, this works well with all the mountune upgrades and knowing it has been designed engineered with performance gains in mind.
As a bit of a Mountune addict and as it improves engine breathing, I bought the exhaust upgrade to compliment all the the rest of the Mountune goodies that are installed on the car. As with all things Mountune, the build quality is brilliant, and once again my local and very obliging Ford garage fitted the system. The exhaust sounds fantastic even in normal driving mode but go to sports mode and it sounds brilliant. However, it’s not over the top, it just sounds and performs like a hot hatch should. A highly recommend upgrade even if you don’t have any other Mountune goodies.