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Quaife ATB Differential [Mk7 Fiesta ST]
Available fromĀ mountune, the Quaife ATB helical LSD differential for Mk7 Fiesta STĀ fits theĀ 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, theĀ Quaife differential relies on gears rather than clutch plates for its operation. That means it is much smoother in operationĀ andĀ 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.
Ā

Fitting at HQ?
HQ fitting time: 6 hrs
Please note: the price shown for this product includes installation at mountune HQ only, and is not transferrable to any other dealer or installer.
Please specify your preferred installation date in the 'notes' section when checking-out; our workshop team will then contact you to confirm this date. If we can't accommodate your preferred choice, the team will discuss other available dates.
Quaife ATB Differential [Mk7 Fiesta ST]
Available fromĀ mountune, the Quaife ATB helical LSD differential for Mk7 Fiesta STĀ fits theĀ 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, theĀ Quaife differential relies on gears rather than clutch plates for its operation. That means it is much smoother in operationĀ andĀ 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.
Ā

Fitting at HQ?
HQ fitting time: 6 hrs
Please note: the price shown for this product includes installation at mountune HQ only, and is not transferrable to any other dealer or installer.
Please specify your preferred installation date in the 'notes' section when checking-out; our workshop team will then contact you to confirm this date. If we can't accommodate your preferred choice, the team will discuss other available dates.
Product Information
Product Information
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Shipping & Returns
Description
Available fromĀ mountune, the Quaife ATB helical LSD differential for Mk7 Fiesta STĀ fits theĀ 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, theĀ Quaife differential relies on gears rather than clutch plates for its operation. That means it is much smoother in operationĀ andĀ 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.
Ā

Fitting at HQ?
HQ fitting time: 6 hrs
Please note: the price shown for this product includes installation at mountune HQ only, and is not transferrable to any other dealer or installer.
Please specify your preferred installation date in the 'notes' section when checking-out; our workshop team will then contact you to confirm this date. If we can't accommodate your preferred choice, the team will discuss other available dates.