Description

The E-Street Cylinder Heads for GM LS3 are designed as premium qualitybolt-on-ready cylinder heads for any high-performance or stock replacement application. The chambers are 69ccwhile the Beehive springs allow .570â? lift camshafts.Edelbrock introduces its new E-Street 15-degree LS3 69cc cylinder heads (PN 77620) as a premium replacement optionensuring 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.&#x0D &#x0D Sold in pairs and assembled with premium COMP Cams® valve train componentsthese LS3 heads are engineered with the same architecture as the factory headand all stock components will fit without issue. The assembled heads feature Beehiveâ?¢ Valve Springschromoly steel retainersheavy-duty stainless-steel Inconel valvesand top-quality valve seals â?? all inspected and assembled by qualified Edelbrock technicians. The intake valve size is 2.165â? while the exhaust is 1.590â?. The Beehive Valve Springs allow up to .570â? lift camshaftsideal for many mild to hot camshaft grinds.&#x0D &#x0D Edelbrock E-Street 15-degree LS3 cylinder heads are manufactured with premium aluminum alloymachined to the industryâ??s tightest tolerances. They feature manganese bronze valve guides for extended wearwith particular emphasis placed on holding precision tolerances on valve seat concentricity. This allows the valves to seal securelyeliminating any leak-down and increasing cylinder pressures during engine operation.&#x0D &#x0D 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.

Assembled: Yes

CNC Machined Exhaust Port: No

CNC Machined Intake Port: No

CNC-Machined Combustion Chamber: No

Combustion Chamber Volume: 69 CC

Exhaust Port Shape: D Shape

Exhaust Valve Angle: 15 DD

Guide Plates Included: Yes

Guidplate Pushrod Size: Hydraulic flat tappet

Intake Port Location: Stock

Intake Port Shape: Rectangle

Intake Runner Volume: 260 CC

Intake Valve Angle: 15 DD

Intake Valve Job Diameter: 2.165 Inch

Intake Valve Stem Diameter: 8 MM

Material: Aluminum

Quantity: Sold in Pairs

Retainer Diameter: Standard

Retainer Material: Steel

Rocker Arm Studs Included: 2.140 in

Spark Plug Style: 14mm3/4″ Reach5/8″ Hex

Steam Holes Drilled: No

Valve Cover Mounting Style: Center bolt LS3 compatible

Valve Guide Material: Manganese Bronze

Valve Guide Size I.D.: 8 MM

Valve Guide Size O.D.: .502 Inch

Valve Spring Diameter: 1.282″ / 1.077″

Valve Spring Maximum Lift: .570 Inch

Valve Spring Type: Beehive