4758-2 Checking Springs Specially designed to simplify measuring piston-to-valve clearance, rocker ratio, cam degreeing and so on. Comparable to the part number 4758-2 both in quality and functions. 4929 Valve Spring Height Micrometer Measurer Features ultra-precise readings and is accurate to .001", can conveniently and accurately measure the installed valve spring height for most V8s engines from 1.600 inch to 2.200 inch. Easy Installation .
