At Alfa9 Supply we have extensive experience with all differential types, and have used them in racing. We know the ins and outs of Helical ATB’s vs. a Clutch/Plate type and when to use them for different applications.

For the 4C, on any fast road or race track use, a top choice is the Helical type like the Quaife because of its lockup and compatibility with the 4C electronics. Quaife Ltd. is both a proven OEM factory supplier, and aftermarket supplier, giving you the confidence you need to install them in your Alfa 4C gearbox.

Representing the ultimate in durability and performance, this Quaife ATB Helical LSD differential unit is a must have upgrade when doing any transmission work on the Alfa Romeo 4C. This unit is proven to work in conjunction with the 4C’s electronics.

Legendary Quaife quality will add durability to your 4C, and is necessary for high hp tuned Alfa Romeo 4C’s being used on the racetrack. The proprietary Quaife lockup feeling is equally usable on the street as the track, ensuring your 4C won’t be hindered in the daily commute.

Quaife ATB Helical LSD differential for Alfa Romeo 4C is a direct replacement for the standard Alfa Romeo open differential. Unlike a plate-style limited slip differential, the Alfa Romeo 4C Quaife differential relies on gears rather than clutch plates for its operation. That means it is much smoother in operation.

With a proven history in circuit racing, drag racing, rallying and road use, the Quaife unit is the way to go when upgrading the Alfa Romeo 4C gearbox.

These Quaife units are priced with shipping included.