For the Alfa Romeo 4C, The Wavetrac™ Helical type differential is the perfect option, combining affordability with performance. This unit is Made in USA and offers some unique features.

Once installed, you’ll be amazed at how much this unit improves drive and traction out of the corners, and allows the car to be better rotated on throttle.

We highly recommend doing the differential upgrade at the same time as doing the clutch on the 4C. This will be a more durable unit and increase sevice interval timing.

Proprietary torque sensing operation splits power to ensure traction improvements and better grip, and the 9210 steel alloy gears and hardened case, combined with ARP brand fasteners finish off the package, ensuring durability so won’t need to quickly re-open the 4C gearbox to service it.

In stock for immediate shipment, our special A9S pricing does include shipping to USA lower 48 states*