Fits: Big Block, (hydraulic flat tappet camshafts) Cylinder Head, Performer RPM, Aluminum, Assembled, 84cc Chamber, 210cc Intake Runner, Mopar, Each Cylinder Head Style: Assembled Cylinder Head Material: Aluminum Cylinder Head Finish: Natural Combustion Chamber Volume (cc): 84 CNC-Machined Combustion Chamber: No Intake Runner Volume (cc): 210cc Exhaust Runner Volume (cc): 70cc CNC-Machined Intake Runner: No CNC-Machined Exhaust Runner: No Combustion Chamber Style: Closed chamber Intake Port Location: Standard Exhaust Port Shape: Rectangular Exhaust Port Location: Standard Spark Plug Style: Angle Intake Valves Included: Yes Intake Valve Diameter (in): 2.140 in. Exhaust Valves Included: Yes Exhaust Valve Diameter (in): 1.810 in. Valve Springs Included: Yes Maximum Valve Lift (in): 0.600 in. Outside Diameter of Outer Spring (in): 1.550 in. Damper Spring Included: Yes Number of Springs Per Valve: Single Retainers Included: Yes Retainer Material: Steel Locks Included: Yes Lock Style: 7 degree Valve Stem Seals Included: Yes Valve Stem Seal Style: Positive stop Rocker Arm Studs Included: No Rocker Arms Included: No Rocker Arm Nuts Included: No Guideplates Included: No Valve Cover Mounting Style: Perimeter bolt Accessory Bolt Holes Drilled: Yes Intake Valve Angle: 15 Valve Guides Included: Yes Valve Guide Material: Manganese bronze Valve Seats Machined: Yes Valve Seat Machine Style: 3-angle Valve Seat Material: Ductile iron Steam Holes Drilled: No Oiling Style: Through head Machined for O-Ring: No Heat Crossover: No Quantity: Sold individually. Notes: These heads require adjustable rocker arms and a minimum of a 2.0 in. header tube. A smaller tube has a smaller radius and will not clear the spark plugs. Vacuum advance distributor may not clear cylinder head. These Edelbrock Performer RPM aluminum cylinder heads feature threaded inserts in the rocker studs and exhaust manifold bolt holes for superior strength and durability. They also feature hardened seats, bronze valve guides, and fully machined valve cover rails for a more consistent gasket seal. They offer improved power throughout the rpm range for greater throttle response and top-end horsepower.
