Isky hydraulic roller. HR-890 INT, HR-891 EX. Lobe centre 110 deg, cam advance 2 deg, duration 306 deg., intake timing, open 47 deg before TDC, close 79 degrees after BDC, cam lift .400, valve lift .640, lash 0 degrees, Exhaust timing - duration 310 deg, open 89 before BDC, Close at 41 deg after TDC, cam lift .400, valve lift .640, valve lash 0 deg. Overlap 88 dgrees. Comes complete with timing gear set and chain. I had this custom ground by Isky for my 383 stroker. I put less than 5,000 miles on this cam and loved it. It's in as new condition.. This is intended for a factory roller cam engine, but doesn't have the stepped nose for the factory cam thrust plate. It will need a cam button to control cam walk. Asking $250.