Crate Innovations Pro Series 604 Valve Spring Shim Kit
The kit is boxed with 12 each of 4 thicknesses of shims.
It includes a custom .025 size for the shop that wants to be on close tolerance.
NOTE: --adjusting shims are to be placed under the factory locating shim.
Valve Seal must be removed for proper installation.
The kit is compiled of:
Shims are color-coded and bagged individually for easy identification.
WARNING: GM minimum installed height specification is 1.780.
Shimming springs less than specification can result in engine damage and/or disqualification of a competitor.Only qualified personnel should attempt this procedure.
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