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ensures back-pressure remains low
3L EcoBoost engine frees up rotating mass and helps to improve engine response
sound and features
3-litre EcoBoost engine used in the Mk4 Focus ST
The black anodised T-6061 billet looks stunning in any engine bay
Quaife ATB Differential [Mk8/MK8.5 Fiesta ST / Puma ST] Upgrade ensures back-pressure remains lowFor vehicles without the Performance Pack Available from mountune, the Quaife ATB helical LSD differential for Mk8 Fiesta ST Puma ST fits the B6+ gearbox. A direct replacement for the standard Ford open differential, the Quaife differential transforms your car's performance. Unlike a conventional plate style limited slip differential, the Quaife differential relies on gears rather than clutch plates for its operation. That means it is much smoother in
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