Edelbrock Victor CNC GM LS7 12 Degree 6-Bolt Cylinder Head, 291cc, .220in Int Port, CI PM Seat

Manufacturer Part # : 77679

Market Description

• The Edelbrock Victor CNC 12 6-Bolt Head for GM LS7 291cc/69cc Individual #77679 is designed for maximum effort naturally aspirated and boosted applications. It features .220 raised intake runners and .100 raised exhaust ports that provide a better line of sight into the cylinders and allow for an improved short turn. The raised intake runner design fits both stock and aftermarket LS7 intake manifolds and can be used with stock or aftermarket valve trains. The head utilizes the GM LS 6-bolt design, making it compatible with the GM LSX block and all aftermarket iron or aluminum 6-bolt per cylinder LS race blocks. The 6-bolt design offers increased clamping capacity over the standard factory 4-bolt configuration and improves head gasket sealing – ideal for high compression naturally aspirated engines and high boost applications. Features include a 12-degree valve angle and fully CNC-machined ports for maximum airflow. CNC-machined runners and chambers, as well as the .220 raised intake ports and 12-degree valve angle, increase overall flow capability, while a revised water jacket design enhances thermal conductivity and tunability. The manganese bronze valve guides withstand long wear with emphasis placed on holding precision tolerances on valve seat concentricity, allowing the valves to seal securely, which eliminates leak down and increases cylinder pressure during engine operation. Finally, the .700 thick deck and .400 raised valve cover rail make this head ideal for maximum horsepower and high valve lift applications. All Edelbrock Victor CNC heads feature patented Clean Cast Technology(TM) , a 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. Part #77679 is a bare head that features: 291cc runners, 69cc chambers, 2.200 intake/1.615 exhaust valves, CI PM valve seats and no down nozzles.
• Edelbrock Victor CNC® LS7 Cylinder Heads are one of the first aftermarket high-performance LS-style heads to feature a raised intake runner design that fits both stock and aftermarket LS7 intake manifolds and valvetrain setups. The raised runner and rolled valve angle increase overall flow capability, while an improved water jacket design improves thermal conductivity. These premium 110 BHN 355-T6 aluminum alloy cylinder heads (#77679) are designed with a 12° valve angle and 291 cc .220" raised intake runners to provide a better line of sight into the 69 cc chambers and allow for an improved short turn. The exhaust ports are also raised .100” to allow the use of stock and aftermarket manifolds, while the .400” raised rail works with aftermarket rockers. The 100% CNC-ported runners and combustion chambers optimize volume, atomization, and velocity. The 6-bolt design increases clamping capacity and greatly improves head gasket retention in high-horsepower and boosted applications in small and large cubic inch, hardcore street applications. It also makes it compatible with the advanced Edelbrock LS Race, GM LSX 6-bolt, and OEM 4-bolt blocks. Built to withstand race conditions, the .750”-thick deck surface and a reinforced solid rocker rail increase integrity, rigidity, and stability. The copper-infused powder metal seats received a 2.200” intake and 1.615” exhaust valve job. The heads are sold bare, but we recommend COMP shaft mount rocker system (#1523CPG), valves, and springs, or if you want to use single rockers like #1479-16, you will need our LS7 rocker stands (#54520-2).

Associated Comments

VICTOR CNC 291 220 LS7 6-BOLT FLANGE COPPER SEATS; Requires COMP Shaft Mount Rockers. OEM LS7 Rocker Adaptor (Requires qty 2); Premium 110 BHN aluminum alloy, .220" raised intake port, .100" raised exhaust port, CI PM valve seats, 307cc or 291cc intake port volume, 2.250" or 2.200" x 1.615" valve job

Product Description - Extended

• These premium aluminum alloy 6-bolt cylinder heads are designed with a 12° valve angle and unique 291 cc .220" raised CNC-ported intake runners to provide a better line of sight into the 69 cc chambers and allow for an improved short turn.
• The Edelbrock Victor CNC 12 6-Bolt Head for GM LS7 291cc/69cc Individual #77679 is specifically designed for maximum effort naturally aspirated and boosted applications.

Features and Benefits

• Premium 110 BHN aluminum alloy, .220" raised intake port, .100" raised exhaust port, CI PM valve seats, 307cc or 291cc intake port volume, 2.250" or 2.200" x 1.615" valve job
• .750" thick deck surface increases integrity; Reinforced solid rocker rail increases rigidity & stability; 355T6 aluminum withstands race conditions
• The raised runner and rolled valve angle increase overall flow capability while an improved water jacket design improves thermal conductivity.
• The heads also utilize the popular LS 6-bolt head design, making them compatible with both the EDELBROCK® LS Race Block and GM LSX Blocks.
• 400" raised rail works w/ aftermarket rockers; .100" raised exhaust port allows use of stock & aftermarket manifolds
• Increased clamping capacity greatly improves head gasket retention in high horsepower and boosted applications.
• Increased clamping capacity greatly improves head gasket retention in high horsepower & boosted applications.
• 6-bolt head design is compatible w/ the advanced EDELBROCK® LS Race, GM LSX Blocks, or OEM 4-bolt blocks.
• Can be used in small & large cubic inch, hardcore street applications.
• 100% CNC-ported runners optimize volume, atomization & velocity.
• Sold Bare, Fully Machined with Valve job.

Product Description - Short

Edelbrock Victor CNC GM LS7 12 Degree 6-Bolt Cylinder Head, 291cc, .220in Int Port, CI PM Seat

Label Description

Victor CNC LS7 291CC CI PM Seat 2.200/1.615 - Bare

Product Description - Invoice

Victor CNC LS7 Head Ci PM Valve seats

AAIA Part Type Description

Engine Cylinder Head

Product Description - Abbreviated

Cyl. Head