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ProMaxx Performance 9318 317 Series Aluminum Cylinder Heads for Big Block Chevy

723-9318


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9318 317 Series Aluminum Cylinder Heads for Big Block Chevy
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$2,144.00
Oversize Fee:$19.99
317 Series Aluminum Cylinder Heads
  • Big Block Chevy
  • As-Cast
  • 317cc Intake Ports
  • 119cc Combustion Chamber
  • 2.25'' Intake / 1.88'' Exhaust Valves
  • 7/16'' Rocker Arm Studs
  • .600'' Max Lift
  • Steel Retainers
  • Assembled, 2/pkg
  • Estimated to ship direct from manufacturer on 04/29/24 , pending manufacturer availability. Learn More

    Thank you! We will notify you when this product becomes available.

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    Will these heads work on gen6 454 the water port are different 

    Asked by: Camaro
    The ProMaxx 723-9318 cylinder head will work with a Gen VI block.
    Answered by: jshook
    Date published: 2023-11-16

    can they take a 600 lift roller cam in a gen 6 454

    Asked by: teto
    The maximum lift that the valve springs on this head can take is .600".
    Answered by: Rusty B
    Date published: 2018-06-06

    What arp head bolts will I need for promaxx 317 heads?

    Asked by: Mark 2238
    The BBC head bolts from ARP are #135-3603
    Answered by: Dean R
    Date published: 2019-03-03

    are these heads oval port or rectangular port ?

    Asked by: Ruben
    These are rectangular port heads.
    Answered by: Rusty B
    Date published: 2019-03-03

    Can I buy these heads with upgraded springs to come ready to support .650 or larger lift? If so how much extra is it?

    Asked by: Jakew
    These do not have a spring option available. They would have to be changed upon receiving them.
    Answered by: Jon Jegs Tech
    Date published: 2023-11-22

    Hi do these heads have a raised exhaust port or standard location?

    Asked by: runningwithscissors
    These heads have the exhaust port in the standard location.
    Answered by: Rusty B
    Date published: 2024-02-08

    Are these heads hydraulic flat tapet

    Asked by: Ddn71
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