
Marine Performer RPM Aluminum Cylinder Heads for Rectangle Port Big Block Chevy
- Marine Big Block Chevy 396-502ci
- Rectangle Port
- Port Volume: 290cc/110cc
- Valve Size: 2.25"/1.89"
- 118cc Combustion Chambers
- Bare with Valves, Sold Individually
These Edelbrock marine cylinder heads include severe-duty, 1.89' inconel exhaust valves for the added durability needed in marine applications and have one-piece stainless steel 2.25' intake valves with hardened tips and swirl-polished heads. Edelbrock Marine heads come with valves and seals only.Tech Tip: To gain more spark plug clearance, Edelbrock recommends using Champion RC Series plugs such as the RC12YC (P/N 192-49776). They are 0.230' shorter than a conventional spark plug and have a 5/8' hex for easier access.
Combustion Chamber Volume: 110cc Intake Runner Volume: 290cc Exhaust Runner Volume: 118cc Intake Valve Diameter: 2.25' Exhaust Valve Diameter: 1.89' Valve Stem Diameter: 11/32' Valve Guides: Manganese Bronze Deck Thickness: 9/16' Valve Spring Maximum Lift: N/A Rocker Stud: 7/16' Guideplate: Hardened Steel 3/8' Pushrod Diameter: 3/8' Valve Angle: 26° Exhaust Port Location: Stock Spark Plug Fitment: 14mm x 3/4' Reach,
Gasket SeatEmissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Maximize big block performance with Edelbrock Performer RPM Aluminum Cylinder Heads for Big Block Chevy, available at JEGS. Designed for enthusiasts who want increased airflow, horsepower, and efficiency, these high-performance cylinder heads are a proven upgrade for street and strip builds. Engineered by Edelbrock, the Edelbrock Performer RPM Aluminum Cylinder Heads for Big Block Chevy deliver race-inspired technology with the reliability needed for real-world driving. Whether you’re building a classic muscle car or upgrading a high-horsepower street machine, these heads are a key component in unlocking your engine’s full potential.
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Performance Benefits & Key Features
Edelbrock Performer RPM cylinder heads are designed to significantly improve airflow and combustion efficiency, resulting in increased horsepower and torque. Featuring optimized intake and exhaust port designs, these aluminum heads promote better air/fuel mixture flow, enhancing engine performance across the RPM range. The improved airflow characteristics make them ideal for engines producing 400–600+ horsepower, depending on the overall build.
Constructed from lightweight aluminum, these heads offer superior heat dissipation compared to traditional iron heads, helping reduce engine temperatures and improve durability under load. Key specifications often include larger valve sizes, precision-machined combustion chambers, and high-quality valve springs designed to support performance camshafts. The reduced weight also contributes to better vehicle balance and handling.
For performance enthusiasts, these cylinder heads provide noticeable gains in throttle response, acceleration, and overall engine efficiency. Whether naturally aspirated or paired with power adders, they offer the airflow and strength needed to support serious performance upgrades.
Fitment, Compatibility & Applications
The Edelbrock Performer RPM Aluminum Cylinder Heads for Big Block Chevy are specifically designed for GM big block Chevy engines, making them an ideal fit for a wide range of classic and modern builds. These heads are compatible with popular big block platforms such as 396, 402, 427, and 454 engines, ensuring broad application across Chevy performance vehicles.
Perfect for street performance, drag racing, and street/strip applications, these cylinder heads are commonly used in Camaros, Chevelles, Novas, and classic GM trucks. They are also an excellent choice for restoration builds where improved performance is desired without sacrificing compatibility with traditional engine configurations.
Their design allows for straightforward integration with aftermarket intake manifolds, camshafts, and valvetrain components, giving builders flexibility when customizing their setup. Whether you’re upgrading an existing engine or building from the ground up, these heads provide the compatibility and performance needed for a successful build.
Backed by Edelbrock’s reputation for precision engineering and performance innovation, these cylinder heads deliver reliable, high-performance results. Explore the available options at JEGS to find the right configuration and take your big block Chevy engine to the next level.



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