IN BRAND NEW CONDITION

PART # 90-4915

DRAG PART # 2009-9080

TUCKER PART # 499521

Fits: S&S cylinder heads for Twin Cam, 4 in. bore Evolution Big Twin, and Super Sidewinder Plus style S&S engines

• Designed to be used in S&S cylinder heads for Twin Cam, 4 in. 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 open when you press the start button and close when the button is released
• Kits include the required parts for installation
• For ease of installation and removal, a special socket can be purchased separately
• Not for use on OEM heads
• Made in the U.S.A.