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Top Street Performance

Chevy Small Block Straight Plug Aluminum Cylinder Head

Chevy Small Block Straight Plug Aluminum Cylinder Head

SKU: JM4100S

$595.00
$595.00 $617.28
Shipping calculated at checkout.

In stock

Top Street Performance (TSP) is committed to providing high-quality performance parts while complying with emissions regulations. This product is designed for use on vehicles that comply with federal emissions regulations. It is the customer’s responsibility to verify that this part is legal for use in their state or local jurisdiction. Check with your local emissions authority before purchasing.

Product Details

Features

  • Fits Chevy Small Block V8 engines 262–400 including 350 and 383 stroker applications
  • 198 cc intake runners, 64 cc chambers for improved airflow and power potential
  • Bare aluminum casting allows custom valve train selection for your camshaft and power goals
  • Straight Plug aluminum cylinder head design for street, strip and performance engine combinations

Description

Upgrade your Small Block Chevy with bare aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 198 cc intake runners, 64 cc combustion chambers, 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.

Performance-Focused Specifications
Key specs such as intake runner volume, combustion chamber size, valve sizing, and straight plug layout are selected to support a strong balance of street drivability and performance output.

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.

Specs

Intake Runner198 cc
Combustion Chamber Volume64 cc
QuantitySold Individually

Engine Fitment

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.

Q&A

What engines are these cylinder heads compatible with?
These cylinder heads are designed for COMPATIBLE WITH, CHEVROLET SMALL BLOCK V8 GEN. I, NOTES:, Fits perimeter-bolt valve covers and pre-Vortec intake manifolds.


Are these heads assembled or bare?
These cylinder heads are sold bare (not assembled). Please refer to the product details for full specifications and included components.


What is the combustion chamber size?
These cylinder heads feature a combustion chamber volume of 64 cc, which can affect compression ratio and overall engine performance.


What material are these cylinder heads made from?
They are made from aluminum, which helps reduce weight and improve heat dissipation.


Will these cylinder heads improve engine performance?
Yes, performance cylinder heads are designed to improve airflow, which can increase horsepower, torque, and overall engine efficiency.


Are these a good upgrade over stock cylinder heads?
Yes, these cylinder heads are a strong upgrade for improving airflow and overall engine performance compared to factory heads.


Do these heads require additional components for installation?
Depending on your setup, additional components such as gaskets, pushrods, valve train components, or tuning may be required.


Are these suitable for street or race applications?
These cylinder heads can be used for street performance and performance builds depending on the overall engine combination.

Emissions Notice

This Top Street Performance (TSP) product is designed for racing and off-road competition use only. It is not legal for use on public roads or emissions-controlled vehicles and does not comply with federal, state, or local emissions regulations. The buyer assumes all responsibility for legal use and installation.

What is a Emissions-Controlled Vehicle?
"An emissions-controlled vehicle is any vehicle equipped with a factory-installed emissions control system designed to reduce air pollution. These systems include catalytic converters, oxygen sensors, EGR (Exhaust Gas Recirculation) valves, and diesel particulate filters (DPF). Most vehicles manufactured after 1975 are considered emissions-controlled and must comply with federal and state emissions laws when used on public roads."