- Engines & Components
- Cylinder Heads
- AFR Big Block Chevy Magnum 18 Degree 457cc Race Aluminum Cylinder Heads
AFR Magnum 18 Degree 457 cc Big Block Chevy heads are the highest flowing head offering from AFR for Big Block Chevy engines. By having the intake ports raised .500 in. along with the combination of moving the valves to 18 degrees, Magnum 18 degree cylinder head will flow a whopping 498 cfm of air through the intake ports at 1.000 in. lift. Designed for 540 ci and larger racing engines, AFR offers Magnum 18 degree fully assembled, bare CNC ported, and bare unported casting for custom port work.
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AFR - Airflow Research 3708
AFR - Airflow Research Magnum 18 Degree 457 cc Racing Aluminum Cylinder Heads for Big Block Chevy - Rectangle Port
$3,475.59
Estimated to ship direct from manufacturer on 01/16/25, pending manufacturer availability.
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$3,475.59
Estimated to ship direct from manufacturer on 01/16/25, pending manufacturer availability.
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Lowest Price Guarantee
Bare
AFR - Airflow Research 3704
AFR - Airflow Research Magnum 18 Degree 457 cc Racing Aluminum Cylinder Heads for Big Block Chevy - Rectangle Port
$1,708.32
Estimated to ship direct from manufacturer on 01/16/25, pending manufacturer availability.
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$1,708.32
Estimated to ship direct from manufacturer on 01/16/25, pending manufacturer availability.
FREE Shipping
Lowest Price Guarantee
AFR - Airflow Research 3707
AFR - Airflow Research Magnum 18 Degree 457 cc Racing Aluminum Cylinder Heads for Big Block Chevy - Rectangle Port
$2,829.44
Estimated to ship direct from manufacturer on 01/16/25, pending manufacturer availability.
FREE Shipping
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$2,829.44
Estimated to ship direct from manufacturer on 01/16/25, pending manufacturer availability.
FREE Shipping
Lowest Price Guarantee