E-Street 15-Degree Cylinder Heads for GM LS3 Engines with .570″lift

Edelbrock introduces its new E-Street 15-degree LS3 69cc cylinder heads (PN 77620) as a premium replacement option, ensuring great power on any high-performance or stock GM LS3 engine build. These heads offer the best performance value of any aftermarket GM LS3 head.

Sold in pairs and assembled with premium COMP Cams® valve train components, these LS3 heads are engineered with the same architecture as the factory head, and all stock components will fit without issue. The assembled heads feature Beehive™ Valve Springs, chromoly steel retainers, heavy-duty stainless-steel & Inconel valves, and top-quality valve seals – all inspected and assembled by qualified Edelbrock technicians. The intake valve size is 2.165” while the exhaust is 1.590”. The Beehive Valve Springs allow up to .570” lift camshafts, ideal for many mild to hot camshaft grinds.

Edelbrock E-Street 15-degree LS3 cylinder heads are manufactured with premium aluminum alloy, machined to the industry’s tightest tolerances. They feature manganese bronze valve guides for extended wear, with particular emphasis placed on holding precision tolerances on valve seat concentricity. This allows the valves to seal securely, eliminating any leak-down and increasing cylinder pressures during engine operation.

All Edelbrock cylinder heads feature patented Clean Cast Technology™, a revolutionary process that eliminates casting flaws and promotes a smoother internal surface finish for greater air and coolant flow. These benefits provide more power and increased cooling ability right out of the box. A unique dual spark-plug-pocket design allows you to use the factory-style tapered-seat spark plugs or gasket-seat spark plugs available in wider heat ranges for maximum tunability.

Additional Attributes:

GTIN: 00085347899029
Material: Aluminum
Intake Port Shape: Rectangle
Valve Guide Material: Manganese Bronze
CNC-Machined Combustion Chamber: No
Assembled: Yes
Guide Plates Included: Yes
CNC Machined Exhaust Port: No
CNC Machined Intake Port: No
Combustion Chamber Volume: 69
Exhaust Port Shape: D Shape
Exhaust Valve Angle: 15
Guidplate Pushrod Size: Hydraulic flat tappet
Intake Port Location: Stock
Intake Runner Volume: 260
Intake Valve Angle: 15
Intake Valve Job Diameter: 2.165
Intake Valve Stem Diameter: 8
Quantity: Sold in Pairs
Retainer Diameter: Standard
Retainer Material: Steel
Rocker Arm Studs Included: 2.140 in
Spark Plug Style: 14mm, 3/4″ Reach, 5/8″ Hex
Steam Holes Drilled: No
Valve Cover Mounting Style: Center bolt LS3 compatible
Valve Guide Size I.D.: 8
Valve Guide Size O.D.: .502
Valve Spring Diameter: 1.282″ / 1.077″
Valve Spring Maximum Lift: .570
Valve Spring Type: Beehive

Extended Information:

Emissions : Racing or Pre-Emissions Use Only
Life Cycle Status: Available To Order

Packaging:

Quantity of Each: 1
Package UOM: PR
Dimension: 24.5 x 12 x 9 inches
Weight: 56 PG