Dyno Box Stock Clone Valve Spring

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Dyno Trick Box Stock Clone Valve Spring (Factory Pre Checked For Legality) (10.8lbs @ .850 spring height). Provides additional spring pressure at max lift. These have been updated to heat treated for 2013 and also takes full advantage of the new clone valve spring rules. New Improved Hardened (each) New Improved Hardened - Marked with green stripe Show more