PROFORM 66903 Valve Spring Height Micrometer, 1.400–1.800 in Range

The PROFORM 66903 Valve Spring Height Micrometer is a precision engine-building tool designed to help verify installed valve spring height during cylinder head assembly and valvetrain setup. Its 1.400–1.800 inch measuring range accommodates a wide variety of performance cylinder head applications, helping builders establish accurate spring height measurements for proper valve spring installation.
The micrometer features a clearly graduated 0.001 inch scale for controlled, repeatable readings. Accurate spring height measurement is important for confirming installed height, checking spring pressure specifications, and maintaining appropriate valvetrain geometry. The tool is suitable for professional engine builders, machine shops, and performance enthusiasts who need a practical gauge for precise cylinder head work.
The compact design allows the gauge to be used in confined areas around the valve spring and retainer. Its straightforward operation makes it easy to position and read while assembling or servicing an engine. Use the PROFORM 66903 Valve Spring Height Micrometer as part of a complete valvetrain measurement process to support consistent assembly results and help identify setup variations before final engine installation.

Features:

• Brand: PROFORM

• Part Number: 66903

• Tool Type: Valve spring height micrometer

• Measurement Range: 1.400–1.800 inches

• Scale Graduation: 0.001 inch

• Application: Measures installed valve spring height during cylinder head and valvetrain assembly

• Quantity: Each