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Top Street Performance

Chevy Big Block Flat Tappet Assembled Aluminum Cylinder Head

Chevy Big Block Flat Tappet Assembled Aluminum Cylinder Head

SKU: JM4220

$785.00
$785.00
Shipping calculated at checkout.

Out of 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
  • 345 cc intake runners, 124 cc chambers for improved airflow and power potential
  • Assembled with performance valves, springs, retainers, locks and seals for easier installation
  • Lightweight aluminum construction improves heat dissipation versus factory iron castings

Description

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

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

Specs

Assembled Yes
CNC Ported No
Combustion Chamber Style Heart
Combustion Chamber Volume 124 cc
Deck Height Standard
Deck Thickness Standard
Exhaust Crossover No
Exhaust Port Height 1.700 in.
Exhaust Port Location Standard
Exhaust Port Shape Square
Exhaust Port Width 1.500 in.
Exhaust Valve Material Stainless Steel
Finish Natural
Grade Type Performance
Intake Port Height 2.300 in.
Intake Port Location Standard
Intake Port Shape Rectangle
Intake Port Width 1.400 in.
Intake Runner Volume 345 cc
Intake Valve Material Stainless Steel
Material Aluminum
Quantity Sold Individually
Valve Guide Material Bronze
Valve Springs Included Yes
Valves Included Yes

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

Emissions Notice

This product is legal for off road use and non pollution controlled vehicles (1965 & older); however, it has not been tested or approved by the California Air Resources Board (CARB) for highway vehicles in the state of California. By purchasing this product, buyer agrees it will not be used on pollution controlled vehicles in California, or in a state with similar emissions regulations.