Edelbrock 5089 Small-Block Chevy E-Street Cylinder Heads 64cc

Complete aluminum cylinder head assemblies from Edelbrock, model 5089 E-Street heads, are designed as entry-level street performance components for small-block Chevy engines operating in the idle-to-5500 rpm range. Fits 175 Avanti, Buick, Checker, Chevrolet and 6 other makes vehicles from 1955 to 1993, including the 1991-1993 Buick Commercial Chassis and Roadmaster and the 1986-1989 Excalibur Phaeton. Full vehicle list below. The heads feature as-cast intake and exhaust ports with 2.02-inch intake valve diameter and 1.60-inch exhaust valve diameter, designed to move more air through the engine while improving combustion efficiency. Each head includes assembled components with integrated valve springs, seals, locks, retainers, and guide plates, ready for installation with 0.375-inch rocker arm studs and 0.3125-inch pushrods.

The heads are manufactured from aluminum with ductile iron seats and a 9.025-inch deck height, featuring a 0.5625-inch deck thickness and 45-degree exhaust seat angle. Modern combustion chamber design improves the combustion process for reliable performance. These are sold as a set of two complete heads suitable for small-block Chevy applications.

• Part number: 5089
• Series: E-Street
• Product family: E-Series
• Material: Aluminum
• Seat material: Ductile iron
• Construction: Complete assembled
• Quantity: Set of 2
• Deck height: 9.025 in
• Deck thickness: 0.5625 in
• Intake valve diameter: 2.02 in
• Exhaust valve diameter: 1.60 in
• Valve stem diameter: 0.3438 in
• Valve spring diameter: 1.46 in
• Valve spring maximum lift: 0.550 in
• Rocker arm stud diameter: 0.375 in
• Push rod diameter: 0.3125 in (suggested)
• Seat angle: Exhaust 45 deg, Intake 45 dd
• RPM range: Idle to 5500 rpm
• Intake runner volume: 185 CCM
• Exhaust runner volume: 60 CCM
• Combustion chamber volume: 64 CCM
• Horsepower rating: 300-400 hp
• Valve angle: 23 degrees
• Head casting number: 5086P
• Port type: As-cast
• CNC ported: No
• EGR port: No
• Guide material: Manganese bronze
• Guide plate material: Hardened steel
• Valve lock material: Chromoly steel
• Camshaft type: Flat tappet
• Valve springs included: Yes
• Valve seals included: Yes
• Valve locks included: Yes
• Valve spring retainers included: Yes
• Guide plates included: Yes
• Rocker arm studs included: Yes
• Valves included: Yes
• Rocker arms included: No
• Cylinder head gasket included: No
• Valve cover gasket included: No
• Mounting hardware included: No
• Rocker Arm Studs/Bolts Included: Yes
• Exhaust Port Location: Standard
• Rotor Center Bore Inside Diameter: Straight
• Retainer Included: Yes
• Grade Type: Performance
• Assembled: Yes