RPM Motorsports’ Russ Wullenwaber
Russ Wullenwaber, a drag racer, installed a Banks Derringer tuner on his 2020 GMC AT4 Duramax. The tuner significantly improved the truck’s horsepower and performance, exceeding Banks’ advertised gains. Russ plans to continue testing the truck and share his results with the community. He is also excited to try out the Derringer’s different power levels and see how they affect the truck’s performance on the track.