Maximize traction and performance with the Quaife ATB helical limited slip differential for the Focus ST / MMT6 gearbox. A direct replacement for the standard Ford open differential, the Quaife ATB differential transforms your car's performance and improves cornering. 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.
Quaife PN QDF41Z
Benefits over a standard open differential:
- Maximize traction
- Minimize wheel spin
- Reduced torque steer and snatching in front wheel drive cars
- 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.
- Quaife Automatic Torque Biasing Differential - Track Tested and Proven
mountune ATB Differential Installation Kit - Focus ST
Genuine Ford parts required for the installation of the Quaife ATB Differential.
Includes the following
- 2 Output driveshaft seals
- 2 Differential side bearings
- 10 Ring gear bolts
ACT Heavy Duty Race 6 Puck Clutch Kit, Focus ST 2013-18
After thousands of miles of testing in our very own high power Focus ST, we are pleased to offer ACT’s Race Clutch kit for the Focus ST. This upgraded Race type 6 Puck clutch kit is engineered for use with the OE Dual Mass Flywheel and includes a Heavy Duty pressure plate, High Performance 6 Puck Disc , release bearing assembly and alignment tool. The Heavy Duty pressure plate incorporates hardened diaphragm fingers for decreased wear and provides a 33% increase in clamp force over the stock unit.
The ACT Race Clutch includes the Xtreme Race disc with cerametallic pucks and a rigid hub design. This ensures durable performance and quick shifts. The ACT Race Clutch kit provides a moderate and consistent pedal feel, smooth engagement and significantly improved durability. These kits meet SFI Spec 1.1 and have increased torque capacity up to 565 ft.-lbs and are perfect for track use with high power, big turbo applications.
- Increased clamp force
- Compatible with OE Dual Mass Flywheel
- Includes release bearing
- ACT PN FF2 HDR6
Heavy Duty Drive Axle Set, Focus ST / Focus RS
A must for anyone making over 550 lb/ft of torque and using the car in a motorsport environment, this heavy duty front axle set will withstand abuse and hard launches beyond the range of the factory components. Made exclusively by Industry leaders The Drive Shaft Shop, each axle is made from 300M Steel in a larger than stock shaft size with a heavy duty outer CV joint. Inner "Tripods" are reused from your original shafts. Assembly required. Contact us for installation options.
- Motorsport grade design
- Heavy Duty Outer CV Joints
- Includes Inner and Outer Boots, Clamps and Grease
- 300M Steel Axles
- 18% larger diameter than stock