Vehicle Fitment
- Fits most 4 and 6 cylinder engines.
Universal 1.400" to 1.800" Spring Height Micrometer (66903) by Proform®. 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.
Model: 1.400" to 1.800" valve springs |
Reads in 0.005" increments |
Maximum retainer Size of 1.500" |
Finish: natural |
With more than 30 years of experience under the belt, Proform® is one of the greatest manufacturers of direct OEM replacement and performance automotive parts. Based in Warren, Michigan, Proform carries a full line of innovative and top-quality carburetors, alternators, starters, push rods, etc. The company offers a great number of GM officially licensed parts bearing the name of Chevrolet and Bow Tie, and some other divisional trademarks. Proform provides Mustang, Ford Racing, and Cobra engine dress-up parts.