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49-9521
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- Designed to be used in S&S® cylinder heads for Twin Cam, 4” bore Evolution big twin, and Super Sidewinder Plus style S&S® engines
- Consists 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 head
- Reduced cylinder pressure makes it easier for the starter to turn the engine
- When the engine starts, the valve closes and the engine runs normally, with full compression
ELECTRIC COMPRESSION RELEASES- Electric compression releases are solenoid operated
- They automatically open when the starter button is depressed and automatically close when the starter button is released
- When installed on SSW+ or twin cam style S&S® engines, S&S® electric compression releases require the use of S&S® die-cast twin cam style rocker covers or similar covers with a central hole or "chimney"
- The "chimneys" in the rocker covers are required to provide clearance for the solenoids that operate the compression releases
- Electric compression releases are compatible with stock or S&S® rocker boxes for Evolution engines
MANUAL COMPRESSION RELEASES- Manual compression releases are activated by a cable similar to a choke control
- Before starting, the handle is pulled, which opens the compression releases. When the engine fires, the increased cylinder pressure automatically closes the compression releases
- Can be used with any style rocker cover
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