E-Street Gen IV Chevrolet LS3 Inconel Exhaust Valves 0.570" Maximum 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.

• Sold in Pairs (2 complete, assembled heads per part number)
• Ready to bolt on out of the box
• 2.165" Stainless Intake Valve, 1.59" Stainless Exhaust Valve
• GM LS3 Compatible

Vehicle Specific

• 2009-2015 Chevrolet Camaro SS Coupe and Convertible 2008-2013 Chevrolet Corvette and Corvette Grand Sport 2008-2013 Chevrolet Corvette w/ Optional Exhaust 2015-2017 Chevrolet SS

Attributes:

• Brand Name: Edelbrock
• GTIN: 00085347899029
• Assembled: Yes
• CNC Machined Exhaust Port: No
• CNC Machined Intake Port: No
• CNC-Machined Combustion Chamber: No
• Combustion Chamber Volume: 69
• Exhaust Port Shape: D Shape
• Exhaust Valve Angle: 15
• Guide Plates Included: Yes
• Guidplate Pushrod Size: Hydraulic flat tappet
• Intake Port Location: Stock
• Intake Port Shape: Rectangle
• Intake Runner Volume: 260
• Intake Valve Angle: 15
• Intake Valve Job Diameter: 2.165
• Intake Valve Stem Diameter: 8
• 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
• Valve Guide Size O.D.: .502
• Valve Spring Diameter: 1.282" / 1.077"
• Valve Spring Maximum Lift: .570
• Valve Spring Type: Beehive

Extended Information:

• Country of Origin:
• Emissions : Racing or Pre-Emissions Use Only

Packing Information:

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