The Mod Shop 1000cc stage 1 cam is designed for the 1000cc engine with stock pistons. Our 1000cc stage 1 cam has bottom end to top end power. We focused on making sure the bottom end power was not sacrificed. Stage 1 cam has smooth linear power curve while still giving a 8hp gain. Peak power is at 8400-8700rpm. Drop in cam. Made to work with stock valve springs on mav head motors. Fuel tuning required