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Top Street Performance

Chevy Big Block Aluminum Cylinder Head

Chevy Big Block Aluminum Cylinder Head

SKU: JM4200

$896.30
$896.30 $1,018.53
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 Big Block Mark IV applications including 396, 402, 427 and 454 engines
  • 345cc intake runners, 124cc chambers for improved airflow and power potential
  • Bare aluminum casting allows custom valve train selection for your camshaft and power goals
  • Lightweight aluminum construction improves heat dissipation versus factory iron castings

Description

Upgrade your Big Block Chevy with bare aluminum cylinder heads engineered to improve airflow, combustion efficiency, and horsepower potential. Featuring 345cc intake runners, 124cc 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.

Bare Head Build Flexibility
Bare cylinder head configuration gives builders the flexibility to select valves, springs, retainers, and hardware matched to the exact camshaft, RPM range, and power goal.

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

Assembled No
Combustion Chamber Style Heart
Combustion Chamber Volume 124cc
Cylinder Head Finish Natural
Cylinder Head Material Aluminum
Exhaust Port Location Raised
Exhaust Port Shape Rectangular
Intake Port Location Standard
Intake Port Shape Rectangular
Intake Runner 345cc
Quantity Sold Individually
Valve Guide Material Bronze

Engine Fitment

COMPATIBLE WITH
CHEVROLET BIG BLOCK V8
• 6.5L / 396 in³
• 6.6L / 402 in³
• 7.0L / 427 in³
• 7.4L / 454 in³
• 8.1L / 496 in³ stroker combinations (application-specific verification required)

COMMON VEHICLE APPLICATIONS
Chevrolet Chevelle / El Camino (Big Block equipped)
Chevrolet Camaro (Big Block equipped or swapped)
Chevrolet C10 / C/K Trucks (Big Block equipped)
Chevrolet Impala / Caprice (Big Block equipped)
Marine, street/strip, and performance Big Block Chevy builds

NOTES

Designed for Big Block Chevy engine platforms.

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

Verify intake manifold, exhaust header, valve lift, and piston-to-valve clearance.

Not compatible with Small Block Chevy, LS, or LT engine platforms.

Q&A

What engines are these cylinder heads compatible with?
These cylinder heads are designed for COMPATIBLE WITH, CHEVROLET BIG BLOCK V8 GEN. II (MARK IV).


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 124cc, 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."