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Make sure you upgrade the clutch too or you'll get slippage on hard acceleration.




I second that, the stock springs just will not cut it.

05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter