hi guys av been offered these piper cams that was apparently only used for 10 hours of racing then left. av noticed in the pic there is a very slightbbit of polishing on bearings but am not sure if that is common or not on steel cams. also I need to know what performance gains I would achieve? also I don't want the cams to wear too fast ether be too hard! a lot get some pics up also thanks guys here's the spec: race inlet and exhaust cams, in EN40v steel (not cast) with 8.4mm lift on the inlet and 9.8mm on exhaust. Also you have on both cams adjustable rear gears. The inlet has 248 deg duration and the exhaust 244 deg. The engine was a circuit racer giving out 450bhp and these were developement cams with 10 hours approx running. I believe these were posibly machined by a german race cam supplier.