Used as a set the 4233-1INGS and 4234-1EXGS provide improved part throttle torque and low RPM torque. Valve Spring Kit #VSK4003 is required. Decompression mechanism is included.
Hotcams
Stage 1: single-cam motor.Stage 1 has improved power at all RPMs over OEM.Performs well with stock air box lid and exhaust.Uses stock valve springs and rockers.Uses stock auto-decompression mechanism.
Hotcams
Stage 3: single-cam motorSpecifically designed for Hot Rods big bore/stroker kitNot for stock displacementRequires Hot Cams valve spring kit part number SKYFM660S2Uses stock auto-decompression...
Hotcams
 Stage 1: Dual cam engine. Intake and exhaust cams sold separately. Increases bottom and midrange power fo
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