Comp Cams .842 Dia Grooving Tool Dr KDSS You can also order it

You can also order it as an option with the rear bumper (will be discounted $40 due to not having to ship separately)

Valve Spring Diameter: 1

TD190821-WHT

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Comp Cams .842 Dia Grooving Tool Dr KDSS You can also order itLifter Bore Grooving Kit; . 842" Dia (Std. Chevy Dia.) Developed by one of the top NASCAR engine builders, this innovative tool precisely grooves the lifter bore to ensure the pressure fed oil is directly injected into the contact area between lifter and camshaft. This increased oiling significantly reduces wear on the camshaft and lifters and decreases the risk of premature failure during break in. This machine operations to the block is quick, easy,