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About Jims Manual Compression Release Valve

Jims Manual Compression Release Valve

  • Give your starter a hand by installing these in your high-compression, big-inch motor
  • Simple drill and tap (10mm x 1mm) each cylinder head and thread in the self-sealing release valves (thread tap sold seperately)
  • Sold in pairs
  • Made in the USA.

Warning:  California Proposition 65

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