Wavetrac diffs are state-of-the-art helical gear differentials designed, developed, and manufactured in the USA by Autotech Driveline. The Wavetrac Differential is the only torque biasing differential on the market with patent-pending technology that mitigates wheelspin when an unloaded wheel condition arises. During zero axle load conditions, the Wavetrac cam device acts to create internal load, maintaining drive on the gripping wheel instead of acting like an open diff (and going nowhere!). Super strong 9310 alloy steel gears are enclosed in case-hardened steel bodies, held together with ARP fasteners. All Wavetrac differentials include a transferable, Limited Lifetime Warranty.
https://www.overthetopperformance.com/
Fits 6speed manual FWD:
Astra, Corsa, Vectra 1.7CDTi / 1.9CDTi
Astra, Corsa VXR & OPC 1.6T / 2.0T
US Chevy Cruze 6speed manual
stock ring gear bolts are M10x1.25

Note: Available exclusively in North America from Over The Top Performance
Please note: some differentials are built to order and there may be long lead times. Please email us if you have any questions about availability.