TSP LS3 Stage 1 Turbo CamSpecs: 221 231 . 629 . 600 114+2 LSA 3 Bolt Cam Core **This camshaft is only offered in a 3 bolt design, so if you have a single bolt factory camshaft you will need to purchase the three bolt conversion kit that will supply the correct 4x upper timing gear to supply the correct camshaft position signal, as well as the ARP camshaft bolt kit that will supply the three required bolts. We also offer the conversion kit with a complete, upgraded timing set