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COM911-16 Can your current valve springs handle the high spring pressures that are common in racing today? Not as well as these Competition Cams pacaloy valve springs can. They e manufactured from a new high tech proprietary alloy thats able to...

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

SB Chevy Pro-Series Solid Roller Lifters Standard .300 Tall Lifter body manufactured from billet alloy steel. Machined to exact tolerances heat-treated for unparalleled wear resistance. Roller wheel manufactured from high strength alloy .750"...

COM942-16 Can your current valve springs handle the high spring pressures that are common in racing today? Not as well as these Competition Cams pacaloy valve springs can. They e manufactured from a new high tech proprietary alloy thats able to...

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

These comprehensive drive systems are designed to provide contemporary competition engine builders with the most accurate valvetrain components available today. These belt drive systems absorb significant amounts of crank-cam harmonics as well as...

These comprehensive drive systems are designed to provide contemporary competition engine builders with the most accurate valvetrain components available today. These belt drive systems absorb significant amounts of crank-cam harmonics as well as...

These comprehensive drive systems are designed to provide contemporary com-petition engine builders with the most accurate valvetrain components available today. These belt drive systems absorb significant amounts of crank-cam har mon –ics as well...