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ProMaxx Performance 225 Series Aluminum Cylinder Heads Small Block Chevy

723-9227A


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ProMaxx Performance 9227A
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$1,619.99
225 Series Aluminum Cylinder Heads
  • Small Block Chevy
  • 100% CNC Ported
  • 225cc Intake Ports
  • 64cc Combustion Chamber
  • 2.08'' Intake / 1.60'' Exhaust Valves
  • 7/16'' Rocker Arm Studs
  • .700" Max Lift
  • Steel Retainers
  • Assembled, 2/pkg
  • Free Shipping - Ships directly from the manufacturer on 12/31/19
    Save $10 off $150+, $20 off $250+, $40 off $500+, $100 off $1,000+ Orders. Promo Code: SANTA exclusions apply
    QTY

    what is the spring pressure, open and closed. valve material?

    Asked by: racerguy
    Here is the spring pressure; Closed …………………… 230 lbs. @ 1.900” Open …………………….. 600 lbs. @ 1.200” These are stainless steel valves.
    Answered by: Rusty B
    Date published: 2018-08-09

    What is the flow of these at .600 lift?

    Asked by: Belaire55
    The flow at .600" lift is 287/199.
    Answered by: Dean R
    Date published: 2017-12-28

    can you please post the flow numbers for the 100% cnc 225cc cylinder head. thank you

    Asked by: kbails
    The rated CFM on these heads is show as between 225 CFM and 400 CFM depending on the valve lift.
    Answered by: Rusty B
    Date published: 2017-10-31
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