Wavetrac products are state-of-the-art helical gear differentials designed, developed, and manufactured in the USA by Autotech. Wavetrac differentials are unique from other LSD makers due to their ability to perform in no-grip situations making them perfect for low-traction surfaces. Super strong 9310 alloy steel gears are enclosed in case-hardened steel bodies, held together with ARP® fasteners, these differentials are able to minimize wheel spin and provide superior traction. All Wavetrac® differentials include a transferable, Limited Lifetime Warranty.