![JIMS-Manual Compression Release Valves-Compression Releases-MetalCore Harley Supply](http://metalcoresupply.com/cdn/shop/products/manual-compression-release-valves-241574.png?v=1681431268&width=1054)
Manual Compression Release Valves
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- Give your starter a hand by installing these in your high-compression, big-inch motor
- Simply drill and tap (10 mm x 1.0 mm) each cylinder head and thread in the self-sealing release valves
- Made in the U.S.A.
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![JIMS-Manual Compression Release Valves-Compression Releases-MetalCore Harley Supply](http://metalcoresupply.com/cdn/shop/products/manual-compression-release-valves-241574.png?v=1681431268&width=1054)
Manual Compression Release Valves
Sale price$143.95 USD
Regular price