298° DRAG RACE Hydraulic camshaft set. These cams the most power of the hydraulic cams we sell. Be aware, lifter life will be short (but glorious). For road racing, convert to solid lifter and go with a 306 cam. These sticks are not for standard applications. Features chill-hardened billets. Use with required HD Valve Springs and Titanium Valve Spring Retainers. Includes cam locking fixture plate. (254° duration @.050", .466" lift) Valve/Piston and Retainer/Stem Seal clearance must be checked!