The Dodge Viper body was designed to fit the Ofna GTP1 perfectly and was provided with these RTR kits. With a little trimming on the rear wheel section it will bit the Ofna GTPII, DM1 Spec and Kyosho IGT 1. It will not fit longer cars like the Kyosho IGT2 and DM1. I raced my IGT1 years ago with one of these bodies, it looked like a true race car from the drivers' stand.