Rocket Cams Valve Spring Kit 4103-04-01Valve Spring Kits for Twin Cam big twins and Sportster valve stems. Works well with cams up to . 650in. 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 collars, Springs, Shims. Valve Spring Kits for Milwaukee 8 big twins work well with cams up to . 600in. lift.
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