1.375" OD, 0.765" ID, HP Valve Spring Shims, 50 Pk. | A-301-HP | B-301-HP | C-301-HP

Use these Valve Spring Inserts to support valve springs better. They won't compress to maintain pressure and protect heads from spring abrasion.

Three thicknesses are available:

• .060" - for springs in service
• .030" - for new springs
• .015" - for balancing