Brian Tooley Racing BTR Stage 4 V2 Camshaft for Chevrolet GM Gen IV LS3 6.2L233 25X . 636" . 636" 113 LSA INTAKE LOBE LIFT @ TDC: 0. 07458 The V2 Stage 4 LS3 grind has been utilized on many max effort combinations with great success. We see 500+ whp with the addition of proper bolt ons, while maintaining the durability you come to expect from BTR components. It is ground with nitrous in mind as well, working well with up to 300 horsepower worth of night night juice. For proper piston to valve clearance, you cannot mill your