GM 604 Crate Motor Hardened Valve Spring Shims
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Beehive Spring Height Micrometer
Features: Tall Model for Beehive Valve Springs Tool Helps Conveniently and Accurately Measure Installed Valve Springs Install The Tool On The Head Instead Of The Spring and Rotate Dial To Seat The Valve, Locks and Retainer Range: 1.600" to 2.100". Measure installed valve spring height conveniently and accurately. Simply install the height micrometer instead of a valve spring, and then rotate the clearly engraved dial to expand the tool to seat the valve, locks and retainer. Fits most V8 engines with beehive springs.