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190 cc intake runner hydraulic or solid camshaft 1.437 single spring .650 max lift 64 cc combustion chamber 2.020 severe duty stainless intake valve 1.600 severe duty stainless exhaust valves Manley 3/8 rocker studs Manley 5/16 guide plates Billet...

HERR7-1.250 Our 7 degree steel retainers are precision machined from chrome moly and finished in black oxide. These precision retainers are specifically designed for superior strength and durability. Pack of 16...

Herbert Valve Springs are manufactured from the highest quality materials and are inspected during every step of manufacturing to insure the kind of performance you would expect. OD:1.250 ID:.876 Hyd. Spring Max Lift: .550 Spring Type: Single...

These springs were purposely designed for those requiring a reliable spring for endurance racing applications, such as circle track or road racing. But they are also great for short track or drag race applications for racers wishing a longer lasting...

8.680/9.650 3/8 .080 Wall These swedged end pushrods are .080" wall 4130 chrome moly material for maximum strength. Meticulously formed ends with exact radii, constant wall thickness, closely controlled length and painstaking heat treatment all...

2.300 STD LENGTH Made from NK-844 intake and XH-428 exhaust material, Herbert Extreme Duty Valves are some of the highest quality stainless valves available. Features include chrome stems, hard tips, and swirl polished undercut heads.

This Doug Herbert Performance Engine kit is a complete power package that will provide you everything you need to hop-up your small block Chevy and add over 100 horsepower at an amazing low price. Available only at Doug Herbert Performance. Kit...

Made from NK-844 intake and XH-428 exhaust material, Herbert Extreme Duty Valves are some of the highest quality stainless valves available. Features include chrome stems, hard tips, and swirl polished undercut heads.