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AFR - Airflow Research 3575

377cc Rectangle Port 24° Magnum Aluminum Cylinder Heads Big Block Chevy

033-3575

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Estimated ship date 08/29/17 if Ordered Today
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AFR - Airflow Research 3575 377cc Rectangle Port 24° Magnum Aluminum Cylinder Heads Big Block Chevy $3,087.51
377cc Rectangle Port 24° Magnum Aluminum Cylinder Heads
  • Big Block Chevy
  • 121cc Combustion Chambers
  • Bare Head Only
  • Sold in Pairs, 2/pkg.

  • AFR - Airflow Research 3575 Details

    This is an unassembled bare cylinder head with valve guides and valve seats installed only. Does not include any parts such as valves, springs, spring components, studs or guideplates.

    Big Block Chevy 377cc Rectangle Port 24° Magnum Basic Package Components
    100% CNC Ported Combustion Chambers
    100% CNC Ported Exhaust Ports
    100% CNC Ported Intake Ports
    Competition 5-Angle Valve Job
    Intake Valve Size - 2.300'' (Valve not included)
    Exhaust Valve Size - 1.880'' (Valve not included)
    Intake Valve Seats
    Exhaust Valve Seats
    Bronze Valve Guides
    Big Block Chevy 377cc Rectangle Port 24° Magnum Head Specifications
    Head Torque w/Moly Lube 75 Ft. Lbs.
    Rocker Stud Torque 55 Ft. Lbs.
    Intake Port Gasket, 1.775'' x 2.500'' with 1/2'' radius Fel-Pro 375-1275 - DO NOT PORT MATCH Intake Manifold to Fel-Pro Gasket.
    Exhaust Port Gasket AFR 033-6858
    Head Gasket Mark IV 4.540'' Bore, Fel Pro 375-1017
    AFR 033-6850
    Head Gasket Mark V - VI Up to 4.500'' Bore, Fel Pro 375-1047
    Head Gasket Mark V - VI 4.500'' to 4.600'' Bore, Fel Pro 375-17049
    Head Bolts & Studs Standard ARP
    Head Bolt Washers Manley Standard
    Stud Girdle AFR 033-6210
    Suggested Manifold Edelbrock 350-2907 & 350-2927 or Brodix 158-HV2000 & 158-HV2001
    Spark Plug Starting Range Champion C59C, Autolite 3932
    Combustion Chambers 121cc Fully CNC'd
    Intake Port Volume 377cc Fully Ported
    Exhaust Port Volume N/A
    Spring Pocket can be cut to 1.750, no deeper.
    Valve Spacing Standard
    Rocker Arms Standard
    Valve Angle 24° / 4° Intake ; 15° / 4° Exhaust
    Angle Mill, 104cc Maximum .009'' per cc
    Flat Mill, As Cast 108cc, CNC 114cc Maximum .006'' per cc
    NOTE: Flat and Angle mills might require a .120'' thick head gasket.

    Specifications:

    Manufacturer's Part Number:
    3575

    AFR's 377cc Monster Cylinder Head!

    AFR 377's are ideal for large cubic inch combinations, 540-615ci, that are looking for more airflow but want to retain a 2.300'' intake valve. This head will also work well on smaller very aggressive applications, like 489-532ci engines turning over 8000 RPM's. The 377 is very efficient and moves a lot of air early in the curve (415 @ .600'') making it an ideal choice if you're limited to how much cam lift you can run, such as a big inch marine engine with a hydraulic roller cam and a limited RPM ceiling. With close to 440cfm of peak flow, it should be extremely easy to clear 950HP in a single four barrel aggressive applications and even more in well sorted out combinations (especially with tunnel ram/sheet metal dual quad combo's). The exhaust ports are also notably stronger making the 377 an excellent choice in a forced induction or nitrous car that could benefit from the stronger exhaust flow. Of course the 377cc comes standard with AFR's trademark .750'' (3/4'') thick cylinder head deck, reinforced rocker stud bosses, premium one-piece stainless steel 2.300'' intake valves and 1.880'' exhaust valves. Standard combustion chamber volume is 121cc for the 377cc BBC. Take note the higher flowing exhaust ports and bolt pattern are raised .375'' (3/8'') over stock location, this rarely affects header or chassis fitment. .

    Installation Notes: Optional stud girdle required for 2° rolled valve angles and 1'' longer head bolt needed on four bottom exhaust bolt holes. Longer pushrods may also be required.

    377cc Rectangle Port Magnum Cylinder Head Features:
  • 100% CNC Ported Combustion Chambers
  • 100% CNC Ported Exhaust Ports
  • 100% CNC Ported Intake Ports
  • Competition 5-angle Valve Job
  • 377cc Intake Ports
  • Intake Valve, 2.300'' x 5.500'' Overall Valve Length
  • Exhaust Valve, 1.880'' x 5.442'' Overall Valve Length
  • 1.625'' OD PAC Racing Solid Roller Valve Spring, 275 lbs on seat, .850'' maximum lift
  • 10° Titanium Retainers
  • 10° Chrome Moly Valve Locks
  • 7/16'' Rocker Studs
  • Adjustable 3/8'' Guide Plates
  • Viton Valve Seals
  • Hardened Spring Seats
  • Intake Valve Seats
  • Exhaust Valve Seats
  • Bronze Valve Guides

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