Chevy LS1, LS6 Assembled Aluminum Cylinder Head

Upgrade your GM LS with assembled aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 210 cc intake runners, 64 cc combustion chambers, 2.000 in. intake / 1.550 in. exhaust valves, these heads are built for street, strip, and performance engine builds that need better breathing than stock castings.

Improved Airflow & Power Potential
Optimized runner and chamber design helps move more air through the engine, improving throttle response, torque, and top-end horsepower potential across the RPM range.

Assembled Valve Train Setup
Delivered assembled with matched valves, springs, retainers, locks, and seals where specified, helping simplify installation for performance camshaft applications.

Aluminum Construction
Lightweight aluminum construction reduces weight compared to factory iron heads while improving heat dissipation for more consistent performance under demanding conditions.

Built for Street & Performance Builds
Ideal for performance rebuilds, restorations, and upgraded engine combinations. Always verify piston-to-valve clearance, camshaft compatibility, intake manifold fit, and header clearance before final installation.

COMPATIBLE WITH
GM LS SERIES V8 ENGINES - CATHEDRAL PORT
• 4.8L / 293 in³ (LR4, LY2)
• 5.3L / 325 in³ (LM7, L59, L33, LC9, LH6, LY5)
• 5.7L / 346 in³ (LS1, LS6)
• 6.0L / 364 in³ (LQ4, LQ9, LY6 with cathedral-port setup)

COMMON VEHICLE APPLICATIONS
Chevrolet Corvette (LS1 / LS6 equipped)
Chevrolet Camaro / Pontiac Firebird (LS1 equipped)
Pontiac GTO (LS1 / LS2 equipped with compatible setup)
GM Silverado / Sierra / SUV LS-based swaps
Popular LS swap applications using cathedral-port intake manifolds

NOTES

Designed for cathedral-port LS intake manifold applications.

Verify intake manifold, rocker arm, valve cover, head gasket bore, and head bolt/stud compatibility before installation.

Cylinder head sold individually (purchase quantity of 2 required for complete engine).

Not compatible with rectangular-port LS3/L92-style intake manifolds, Gen V LT direct-injection engines, Gen I SBC, or Big Block Chevy engines.

Specifications:
Assembled: Yes
CNC Ported: No
Combustion Chamber Style: Heart
Combustion Chamber Volume: 64 cc
Deck Height: Standard
Deck Thickness: Standard
Exhaust Crossover: No
Exhaust Port Location: Standard
Exhaust Port Shape: D-port
Exhaust Valve Diameter: 1.550 in.
Exhaust Valve Material: Stainless Steel
Finish: Natural
Grade Type: Performance
Intake Port Location: Standard
Intake Port Shape: Cathedral
Intake Runner Volume: 210 cc
Intake Valve Diameter: 2.000 in.
Intake Valve Material: Stainless Steel
Material: Aluminum
Quantity: Sold Individually
Valve Guide Material: Bronze
Valve Seat Material: Steel
Valve Spring Maximum Lift: 0.660 in.
Valve Spring Retainer Material: Chromoly Steel
Valve Springs Included: No
Valves Included: Yes