This listing is for a box of 50 brand new high performance valve spring shims that are 0.030" thick.

They are the high performance version shim and have been hardened to stand up to stiffer valve spring pressures than the stock style shims

• Part Number: VSB305HP
• Shim Thickness: 0.030"
• Shim Outside Diameter: 1.437"
• Shim Inside Diameter: 0.785"

This shim kit will fit many of the following Pontiac 6 and 8 cylinder engines. Please measure the spring pocket and valve guide diameter on your heads to ensure the correct size you need before ordering.

• 230 3.8L 1966-1967
• 350 5.7L 1968-1977
• 400 6.6L 1967-1979
• 428 7.0L 1967-1969
• 455 7.5L 1970-1976