Brand: Airflow Research (AFR) Manufacturer's Part Number: 1455 Part Type: Cylinder Heads Product Line: AFR 220cc SBF Renegade 20 Degree Competition Heads Automotive Fittings Part Number: AFR-1455 Combustion Chamber Volume (cc): 58 Intake Runner Volume (cc): 220cc Exhaust Runner Volume (cc): 80cc Cylinder Head Style: Bare Cylinder Head Material: Cast aluminum Intake Port Shape: Rectangular Intake Valve Diameter (in.): 2.080 in. CNC-Machined Combustion Chamber: Yes CNC-Machined Intake Runner: Yes CNC-Machined Exhaust Runner: Yes Combustion Chamber Style: Heart Intake Port Location: Standard Exhaust Port Shape: Square Exhaust Port Location: Raised Intake Valves Included: No Exhaust Valves Included: No Exhaust Valve Diameter (in.): 1.600 in. Valve Springs Included: No Damper Spring Included: No Retainers Included: No Locks Included: No Valve Stem Seals Included: No 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: 20 Exhaust Valve Angle: 20 Valve Guides Included: Yes Valve Guide Material: Bronze Valve Seats Machined: Yes Valve Seat Machine Style: 3-angle Valve Seat Material: Ductile iron Cylinder Head Color: Natural Steam Holes Drilled: No Oiling Style: Through pushrod Machined for O-Ring: No Heat Crossover: No Remanufactured: No Quantity: Sold as a pair. Notes: Exhaust ports are raised 0.375 in. higher than stock. Bare head. Does not include valves, springs, or studs. Description: AFR 220cc SBF Renegade 20 Degree Competition Heads are the largest, best-flowing choice to top your small block Ford. These power-producing cylinder heads are born of A356 aluminum castings and feature intake ports, exhaust ports, and combustion chambers that are all 100 percent CNC-ported. Renegades are outfitted with lightweight 8mm, 2.100 in. intake valves and 1.570 in. exhaust valves to move massive amounts of air. They come with either combustion chamber volumes of 58 or 72cc accompanied by 70cc exhaust ports, which are raised .375 in. higher than stock. Plus, AFR's trademark 3/4 in. thick cylinder head deck makes them ideal for heavy nitrous or blower applications. Choose the flow characteristics that can give your Ford the power to win—AFR 220cc SBF Renegade 20 degree competition heads.