Edelbrock Performer RPM Cylinder Heads 61559

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 include hardened seats, bronze valve guides, and fully machined valve cover rails for a more consistent gasket seal. These heads offer improved power throughout the RPM range for greater throttle response and top-end horsepower. Countless options are available; order the model recommended for your vehicle and engine application.Brand: Edelbrock
Manufacturer's Part Number: 61559
Part Type: Cylinder Heads
Product Line: Edelbrock Performer RPM Cylinder Heads
HP Direct Part Number: EDL-61559
UPC: 085347615599
Combustion Chamber Volume (cc): 118
Intake Runner Volume (cc): 290cc
Exhaust Runner Volume (cc): 110cc
Cylinder Head Style: Bare
Cylinder Head Material: Cast aluminum
Intake Port Shape: Rectangular
Intake Valve Diameter (in.): 2.250 in.
CNC-Machined Combustion Chamber: No
CNC-Machined Intake Runner: No
CNC-Machined Exhaust Runner: No
Combustion Chamber Style: Open chamber
Intake Port Location: Standard
Exhaust Port Shape: Round
Exhaust Port Location: Standard
Intake Valves Included: Yes
Exhaust Valves Included: Yes
Exhaust Valve Diameter (in.): 1.890 in.
Valve Springs Included: No
Damper Spring Included: No
Retainers Included: No
Locks Included: No
Valve Stem Seals Included: Yes
Valve Stem Seal Style: Positive stop
Rocker Arm Studs Included: Yes
Rocker Arm Nut Thread Size: 7/16 in.-20
Rocker Arms Included: No
Rocker Arm Nuts Included: No
Guideplates Included: Yes
Guideplate Pushrod Size: 3/8 in.
Valve Cover Mounting Style: Perimeter bolt
Accessory Bolt Holes Drilled: Yes
Intake Valve Angle: 26
Valve Guides Included: Yes
Valve Guide Material: Manganese bronze
Valve Seats Machined: Yes
Valve Seat Machine Style: 3-angle
Valve Seat Material: Ductile iron
Cylinder Head Color: Black
Steam Holes Drilled: No
Oiling Style: Through pushrod
Machined for O-Ring: No
Heat Crossover: No
Remanufactured: No
Quantity: Sold individually.
Notes: Heavy-duty, 1.89" Inconel exhaust valves provide added durability for marine applications. Hard anodized black to protect the aluminum in the harsh marine environment. Sold with valves only to allow for valve spring choices, Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat. Spark plug is closer to center of bore, will interfere with high-dome pistons for open chamber heads.