Edelbrock Victor CNC 11° LS3 Cylinder Heads – 263cc, 68cc, 6-Bolt, Bare (Pair) #77670

Edelbrock Victor CNC 11° LS3 Cylinder Heads – 263cc, 68cc Chamber, 6-Bolt, Bare | #77670

When you're building a high-horsepower LS3-based engine and need heads that can flow with the best in the industry, the Edelbrock Victor CNC 11° 6-Bolt Cylinder Heads (#77670) are the benchmark. Engineered specifically for naturally aspirated and boosted high-performance applications, these bare heads combine a rolled 11° valve angle, fully CNC-machined ports and chambers, and the 6-bolt head pattern required for LSX block compatibility — delivering maximum airflow, superior sealing, and the structural integrity to handle serious cylinder pressure. If you're building a race engine that needs to breathe, these heads are the answer.

Key Features

• 263cc CNC-Machined Intake Runners – Large-volume, fully ported runners optimized for high-RPM airflow in naturally aspirated and boosted applications
• 68cc Combustion Chamber – Precision CNC-machined chamber for consistent compression ratios and optimal flame travel
• 11° Rolled Valve Angle – Revised valve angle increases overall flow capability and improves port geometry vs. standard LS head designs
• 2.165" Intake / 1.600" Exhaust Valves – Large-diameter valves for maximum flow at high lift
• 6-Bolt Head Pattern – Compatible with GM LSX block and all aftermarket 6-bolt LS race blocks; superior clamping over standard 4-bolt configuration
• Copper Infiltrated Powder Metal Valve Seats – Premium seat material for durability under high-heat, high-RPM race conditions
• Manganese Bronze Valve Guides – Long-wearing guides with precision tolerances for optimal valve seat concentricity and leak-free sealing
• .700" Thick Deck – Reinforced deck surface for high-compression and high-boost head gasket retention
• Reinforced Rocker Rails – Added structural support for high-lift camshaft and valvetrain loads
• Revised Water Jacket Design – Enhanced thermal conductivity and improved coolant flow for better tunability under sustained race use
• Bare Head – No valvetrain components included; configure your valvetrain to match your specific build

Performance Benefits

The 11° valve angle is the aerodynamic centerpiece of the Victor CNC design — by rolling the valve angle relative to standard LS heads, Edelbrock achieves straighter port paths and improved airflow velocity through the 263cc runners. The result is measurably better volumetric efficiency at high RPM, translating directly to more horsepower on naturally aspirated builds. On boosted applications, the 6-bolt head pattern and .700" thick deck work together to maintain head gasket integrity under the elevated cylinder pressures that kill lesser heads. The copper-infiltrated valve seats and manganese bronze guides ensure the valvetrain stays tight and leak-free through sustained race use — no leak-down, no lost cylinder pressure, no lost power.

Vehicle Fitment

These heads are designed for GM LS3-based engine builds using 6-bolt head pattern blocks.

• Compatible with GM LSX cast iron and aluminum 6-bolt race blocks
• Compatible with all aftermarket 6-bolt per cylinder LS race blocks
• LS3 port and bore spacing — verify compatibility with your specific rotating assembly and block combination
• Professional engine builder recommended for installation and valvetrain setup

Installation Notes

Sold as a bare head — pair. Valves, springs, retainers, locks, seals, rocker arms, and pushrods are not included. Machine shop preparation (surfacing, valve job, assembly) required. Verify head gasket compatibility with your block and bore size before ordering. Standard ground shipping applies (32 lbs per head).

Why Buy From Ozkonic Kustomz

We carry authentic Edelbrock performance components and ship fast. Our catalog is built for serious engine builders who need accurate specs and trusted parts — not generic listings with missing details. When you're spec’ing heads for a race build, you need to know exactly what you're getting. We make sure you do.

Flow More. Make More Power. Order Today.

The Edelbrock Victor CNC 11° LS3 6-Bolt Cylinder Heads are one of the most capable LS head options on the market for high-horsepower builds. Add them to your cart and finish your engine right.