SCE Vulcan Cut Ring Cylinder Head Gasket 4.200" Bore 0.059" Compression Thickness Passenger Side Composite GM LS Series HS210020 Fuel line kit Steep Angled Fuel line kit Features:CNC machined billet aluminum housing and Dupont Rynite baseNo CARB Exemption Order NumberSupplied with Cap A Dapt and rotor (accepts MSD socket style caps)Must be used with an MSD Ignition ControlMechanical advance assembly can be locked out for crank trigger systemsNylon pads ensure smooth operation of the advance weightsAdvance weight pins are staked and tig welded to the plateAdvance 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 bearingMaintenance free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm rangeEasy to adjust mechanical advance with supplied springs and stop bushings Steel Core Laminate Our new Gas Stopper enhancement to MLS Spartan head gaskets is an example of superior design