Proform Tall Valve Spring Height Micrometer; Range: 1.600" - 2.100" (For Most V8 Engines) R01J003S From 3000 to 4500 rpm

From 3000 to 4500 rpm

7/16 to 7/8 in ID

and Idle (including IAC parameters and Idle Spark)

Isolated Ground

15 PSI gauge with AutoMeter's signature racing dial design

Proform Tall Valve Spring Height Micrometer; Range: 1.600" - 2.100" (For Most V8 Engines) R01J003S From 3000 to 4500 rpmMeasure 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. PROFORM invites racers to experience the strength, innovation, and power behind the PROFORM brand. PROFORM Parts (Specialty Auto Parts U. S. A., Inc.) is a leader in the High Performance Automotive Aftermarket by engineering