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This Victor CNC cylinder head for Jeep 4.0L inline-six engines is a fully CNC-ported version of the popular 50169 Performer cylinder head Edelbrock has been producing for the past 19 years. The head features a 182 cc intake port, a 77 cc exhaust port, and a 55 cc combustion chambers. As an additional improvement the Victor CNC has a valve job to match up with the COMP Cams LS-style 8 mm valvetrain. Utilizing the LS-style valves opens a larger variety of valve spring combinations to fit any camshaft profile. These heads are manufactured with premium materials and machined to the industry’s tightest tolerances. Features include ductile-iron valve seats and fully CNC-machined ports for maximum airflow. The premium manganese bronze valve guides withstand long wear with emphasis placed on holding precision tolerances on valve seat concentricity to securely seal the valves, eliminate leak down, and increase cylinder pressures during engine operation.
This Victor CNC cylinder head for Jeep 4.0L inline-six engines is fully CNC ported, featuring 182 cc intake ports, 77 cc exhaust ports, and 55 cc combustion chambers, with a valve job to match the COMP Cams LS-style 8 mm valvetrain.
This cylinder head will also swap onto all AMC Inline six 4.2L engines. This cylinder head must be used with a 1991-2006 intake manifold and a 1991-1998 exhaust manifold. Aftermarket exhaust headers can also be used in place of 1991-1998 exhaust manifolds and MUST be used in place of 1999-2006 exhaust manifolds. Most aftermarket exhaust headers are compatible, but please check with the exhaust header manufacture to verify. This head is NOT compatible with 1999-2006 OEM exhaust manifolds. This cylinder head will also swap onto all AMC Inline six 4.2L engines. However, this swap will require the use of a 4.0L 1991-2006 intake & exhaust manifolds. No modifications are required to the water jacket when swapping an Edelbrock Jeep Performer 4.0L head onto a 4.2L. This cylinder head is a direct bolt-on to 1991-2006 applications originally using 7120, 0360, and 0331 castings. This head will also bolt onto 1987-90 engines (2686 casting) with the 1991-2006 intake manifolds & 1991-1998 exhaust manifolds or aftermarket headers. This cylinder head will also swap onto all AMC Inline six 4.2L engines. However, this swap will require the use of a 4.0L 1991-2006 intake & exhaust manifolds. No modifications are required to the water jacket when swapping an Edelbrock Jeep Performer 4.0L head onto a 4.2L.

• Threaded inserts in the rocker studs and exhaust manifold bolt holes for superior strength and durability.
• 1991-1998 intake & exhaust manifold bolt pattern and port locations
• Accepts distributor ignition or coil rail ignition
• CNC combustion chamber 59 ± 1cc (57 ± 1cc stock)
• Stock valve cover location & bolt pattern
• Larger diameter reinforced rocker bosses
• 10 degree valve angle (stock)
• Stock valve-train geometry
• Stock head bolt pattern
• Stock pushrod length
• .750″ deck thickness
• 3.875″ bore (stock)

The Edelbrock Victor CNC 12 6-Bolt Head for GM LS7 291cc/69cc Individual #77678 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 #77678 is a bare head that features: 291cc runners, 69cc chambers, 2.200 intake/1.615 exhaust valves, copper valve seats and no down nozzles.
The Edelbrock Victor CNC 12 6-Bolt Head for GM LS7 291cc/69cc Individual #77678 is specifically designed for maximum effort naturally aspirated and boosted applications.

• 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