Scat Pro Comp Lightweight 9000 Series Crankshaft - 4.250 in Stroke - External Balance - Cast - 2-Piece Seal - Big Block Chevy 4031 Features:CNC machined billet aluminum housing

Scat Pro Comp Lightweight 9000 Series Crankshaft 4.250 in Stroke External Balance Cast 2 Piece Seal Big Block Chevy 4031 Features:CNC machined billet aluminum housing Features:CNC machined billet aluminum housing and billet aluminum baseWill not accept a vacuum advance canisterMust be used with an MSD Ignition ControlSupplied with an HEI style distributor cap and rotor (accepts Cap A Dapts)O ring seals can be added to modified blocks to improve oil pressure controlSpecial oil tract improves lubrication to the distributor and cam gearNylon pads ensure smooth operation of the advance weightsAdvance weight pins are staked and tig welded to the plateMechanical advance assembly can be locked out for crank trigger systemsAdvance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reductionPolished steel shaft is QPQ coated and guided by a sealed ball bearing and extra long sintered bushingMaintenance free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm rangeEasy to adjust mechanical advance with supplied springs and stop bushingsNo CARB Exemption Order Number and experience our unparalleled lightweight design and longevity