Overkill Motorsports

Welcome to Overkill Motorsports. We specialize in reprogramming the engine computer management systems in your GM W-Body vehicles, equipped with Series II and Series III 3800 Supercharged and Non-Supercharged V6s, 3400 V6, 3500 V6, 3900 V6 and 5.3 LS4 V8! You'll also find a growing number of reprogrammed computer products for other late-model GM V6-equipped cars and trucks.

We are a Canadian outfit, serving our great customers within Canada and across the United States of America. Note that pricing on our site is in United States dollar currency.

Please look around and see what we have to offer for your vehicle!


Proud sponsor and member of the OQCGP W-Body enthusiast club for more than 10 years!


Find reviews of Overkill tuning on these great W-Body community forums