Mk7 Fiesta Quaife ATB Differential - Fully Fitted at mountune HQ


Available exclusively from mountune, the Quaife ATB helical LSD differential for mk7 Fiesta 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 operation and never locks harshly with a set pre-load of wheel slip across the driven axle.

Instead, the Quaife differential automatically biases the torque away from the spinning wheel, across the axle to a constantly varying degree.

Benefits over a standard open differential:

  • maximise traction
  • minimise wheel spin
  • reduced torque steer and snatching in front wheel drive cars
  • a maintenance-free design which retains the standard oil lubrication

Quaife differentials are proven in circuit and drag racing, rallying and road use. All Quaife differentials are produced from Corus steel billets, and are CAD-designed and CNC machined before being inspected to ISO 9001 standards.

Fitted price includes the following:

  • Fiesta ST Quaife ATB differential
  • Installation kit (new bearings, seals and bolts)
  • Transmission fluid

Please note: the price shown for this product includes installation at mountune HQ in Hutton, Essex and is not transferrable to any other Ford dealer or installer. 

Please specify your preferred installation date in the 'notes' section when checking-out; our workshop team will then contact you back to confirm this date. If we can't accommodate your preferred choice, the team will discuss with you other available dates, that are still acceptable to you.

Customer Reviews

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Peter Gallagher

Great Driving Upgrade

It's a real pleasure visiting mountune hq yesterday and you really can see why people come from far and wide to experience a great service from Ryan and the team along with some outstanding products. I have now had this new dif added to my mr230 to improve the cornering even further to what is already a remarkable little car. On the drive home l could tell immediately what they had done had really worked. Thanks alot mountune and no doubt, see you again soon,

Ross P.
United Kingdom United Kingdom

Quaife Differential

Really impressed, makes a big difference going round corners and getting on the power much earlier. The best mod I’ve had done so far especially if you’re running more power. Everyone down at mountune HQ were very friendly and helpful while I was waiting for the installation.


Fiesta ST Quaife LSD fitting.

I had the MR230, the Quaife LSD and 2nd service all done at the same time and this was only possible because Fred came in early to get it all completed in a day. Thanks Fred, much appreciated. Thanks also to Ryan for looking after me through the day. Where better to have this work done than Mountune itself. It's a pleasant place to spend the day; drinks, snacks and the new Top Gear on the TV. The fitting of the LSD is a tricky piece of work so I recommend Mountune. This is not a job for a normal Ford workshop.

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