Pro Import 1200HP-1600HP Cams. Best suited for alcohol fuels. 50lb+ of boost and 10,500rpm when used with KVS18K spring kit. Primary & Secondary lobe specifications are: Intake 270 & 262 / Exhaust 270 & 262 Degrees advertised duration. Intake 11.00mm & 11.00mm / Exhaust 10.00mm & 10.00mm lift.