Manual Compression Release Kit

Designed to be used in S&S cylinder heads for Twin Cam, 4in. bore Evolution big twin, and Super Sidewinder Plus style S&S enginesConsists of a small valve that opens during starting and allows a portion of the cylinder pressure to escape into the exhaust port of the cylinder headReduced cylinder pressure makes it easier for the starter to turn the engineWhen the engine starts, the valve closes and the engine runs normally, with full compressionManual compression releases are activated by a cable similar to a choke controlBefore starting, the handle is pulled, which opens the compression releases. When the engine fires, the increased cylinder pressure automatically closes the compression releasesCan be used with any style rocker cover