Description

The E-Street Cylinder Heads for GM LS3 are designed as premium quality bolt-on-ready cylinder heads for any high-performance or stock replacement application. The chambers are 69cc while 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 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.&#x0D &#x0D 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 Beehiveâ?¢ Valve Springs chromoly steel retainers heavy-duty stainless-steel & Inconel valves and 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 camshafts ideal for many mild to hot camshaft grinds.&#x0D &#x0D Edelbrock E-Street 15-degree LS3 cylinder heads are manufactured with premium aluminum alloy machined to the industryâ??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.&#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.

• Specifications

  • 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: 14mm 3/4" Reach 5/8" 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