Chevy Small Block Straight Plug Aluminum Cylinder Head

Build your Small Block Chevy engine with a bare aluminum cylinder head engineered for custom street and performance applications. Featuring 198cc intake runners, 64cc heart-shaped combustion chambers, 2.02" intake valves, 1.60" exhaust valves, and a straight spark plug configuration, this cylinder head is designed to support improved airflow and performance across a wide range of Small Block Chevy engine combinations.

The 198cc intake runner design provides an excellent balance of airflow and intake velocity, making this cylinder head well suited for 327, 350, 355, 383 stroker, and 400 Small Block Chevy builds. Combined with high-flow intake and exhaust ports, these heads help improve cylinder filling, throttle response, torque production, and horsepower potential throughout the RPM range.

As a bare casting, this cylinder head allows builders to select springs, retainers, seals, and valvetrain components that match their specific camshaft profile and performance goals. This flexibility makes it ideal for custom engine builds, machine shop assembly, street performance vehicles, muscle cars, hot rods, and street/strip applications.

Constructed from lightweight aluminum, this cylinder head helps reduce weight while dissipating heat more efficiently than traditional cast iron heads. Whether you're upgrading a street-driven 350, building a 383 stroker, or assembling a performance Small Block Chevy engine, this bare aluminum cylinder head provides a strong foundation for increased airflow and reliable performance.

 

Cylinder Head Technology
Designed with 198cc intake runners, 64cc heart-shaped combustion chambers, 2.02" intake valves, 1.60" exhaust valves, and a straight spark plug configuration, this aluminum cylinder head is engineered to improve airflow and combustion efficiency in Small Block Chevy applications. The bare casting configuration allows builders to select the exact valvetrain components required for their intended camshaft and RPM range.

Performance Benefits
The 198cc runner design provides a strong balance of airflow capacity and intake velocity, making this cylinder head suitable for street performance, muscle car, hot rod, and stroker engine combinations. Aluminum construction helps reduce weight and dissipate heat efficiently, supporting improved throttle response, torque production, and horsepower potential.

COMPATIBLE WITH
CHEVROLET SMALL BLOCK V8 GEN. I
• 4.3L / 262 in³
• 4.3L / 265 in³
• 4.4L / 267 in³
• 4.6L / 283 in³
• 4.9L / 302 in³
• 5.0L / 305 in³
• 5.0L / 307 in³
• 5.4L / 327 in³
• 5.7L / 350 in³
• 6.6L / 400 in³

COMMON VEHICLE APPLICATIONS
Chevrolet Camaro (1967–1995 SBC equipped)
Chevrolet Chevelle (1964–1977 SBC)
Chevrolet Nova (1962–1979 SBC)
Chevrolet C10 / C/K Trucks (1960–1995 SBC)
Chevrolet Impala / Caprice (SBC equipped)

NOTES

Fits Gen I Small Block Chevy engines (1955–1995).

Fits perimeter-bolt valve covers and pre-Vortec intake manifolds.

Compatible with common SBC stroker builds (383 / 406).

Straight plug design is intended for standard-style SBC header and plug wire layouts; always verify header clearance.

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

Verify intake manifold type, valve lift and spring requirements, and piston-to-valve clearance.

Not compatible with LT1 / LT4 Gen II engines, LS-based engines, or Big Block Chevy engines.

SPECIFICATIONS
Intake Runner: 198 cc
Combustion Chamber Volume: 64 cc
Combustion Chamber Style: Heart
Cylinder Head Material: Aluminum
Cylinder Head Finish: Natural
Assembled: No
Intake Valve Size: 2.02"
Exhaust Valve Size: 1.60"
Valve Stem Diameter: 11/32"
Valve Guide Material: Bronze
Intake Port Size: 2.10" x 1.18"
Exhaust Port Size: 1.4" x 1.4"
Intake Port Shape: Rectangle
Exhaust Port Shape: Square
Intake Port Location: Standard
Exhaust Port Location: Standard
Maximum Spring Diameter: 1.625"
Exhaust Crossover: No
Spark Plug Style: Straight
Weight: 19 lbs (per head)
Quantity: Sold Individually