Shim Kit - 1.250 Dia. PAC-KS93

Valve spring shims are critical for dialing in the correct seat pressure and load curve in high-revving engines. This PAC shim kit gives you four thickness options—0.015", 0.020", 0.030", and 0.050"—so you can fine-tune spring preload without replacing expensive springs. Whether you're building a naturally aspirated screamer or a forced-induction platform, having precision shim options on hand is essential for achieving the exact valve train geometry your engine demands.

• Valve spring shim
• Steel construction
• 1.250" OD
• 0.575" ID
• Four thickness options
• 0.015" / 0.020" / 0.030" / 0.050"
• Kit format
• MPN: PAC-KS93