S&S Cycle 900-0050 .650" Lift Sidewinder® Valve Spring Kit for 1984-2004 Big Twins and 1986-2003 HD® Sportster® Models Magnet Black Smoke and Dark Black

Black Smoke and Dark Black Smoke

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S&S Cycle 900-0050 .650" Lift Sidewinder® Valve Spring Kit for 1984-2004 Big Twins and 1986-2003 HD® Sportster® Models Magnet Black Smoke and Dark BlackS&S Cycle 900 0050 Sidewinder . 650" Valve Spring Kits for Twin Cam 88 big twins w stock heads (both 7mm and 5 16 valve stems) and all S&S Super Stock heads (5 16 valve stems). Works well with cams up to . 650" lift. Manufactured from ultra clean high silicon Kobe alloy wire then micro shot peened and nitrided. CNC machined 9 locks. High performance conical single wire spring. Chromoly forged retainers. Kit contains: Valve keepers, Top & Bottom