Edelbrock Performer RPM Cylinder Head - Assembled - 2.190 / 1.880 in Valve - 290 cc Intake - 110 cc Chamber - 1.550 in Springs - Big Block Chevy Intercom Audio Filters Features:CNC machined billet aluminum housing PQX1835005

Edelbrock Performer RPM Cylinder Head Assembled 2.190 1.880 in Valve 290 cc Intake 110 cc Chamber 1.550 in Springs Big Block Chevy Intercom Audio Filters Features:CNC machined billet aluminum housing PQX1835005 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 Front Suspensions Edelbrock Aluminum Cylinder Heads and Edelbrock Water Pumps have become the industry standard Edelbrock cylinder heads offer improved performance throughout the rpm range for great throttle response and top end horsepower