Techtonics VR6 288° RACE Hydraulic/Solid Lifter camshaft set. Not for standard engines. Made from chill-hardened billets. HD Valve Springs required. Titanium Retainers recommend. Includes cam locking fixture plate. (256° duration @.050", .457" lift) Valve/Piston and Retainer/Stem Seal clearance must be check!. Also recommended to replace the camshaft bolts.