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AFR - Airflow Research 3050

305cc Rectangle Port 24° Magnum Aluminum Cylinder Heads BB-Chevy

033-3050

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Estimated ship date 10/05/17 if Ordered Today
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AFR - Airflow Research 3050 305cc Rectangle Port 24° Magnum Aluminum Cylinder Heads BB-Chevy $2,083.56
305cc Rectangle Port 24° Magnum Aluminum Cylinder Heads
  • BB-Chevy
  • 117cc Combustion Chambers
  • 50% CNC Combustion Chambers
  • Bare Head Only
  • Sold in Pairs, 2/pkg.

  • AFR - Airflow Research 3050 Details

    50% CNC Combustion Chamber (Bowl Blend) Package

    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 305cc Rectangle Port 24° Magnum Basic Package Components
    50% CNC Ported Combustion Chambers
    Bowl Blended Exhaust Ports
    Bowl Blended Intake Ports
    Competition 5-Angle Valve Job
    Intake Valve Size - 2.250'' (Valve not included)
    Exhaust Valve Size - 1.880'' (Valve not included)
    Intake Valve Seats
    Exhaust Valve Seats
    Bronze Valve Guides
    Big Block Chevy 305cc Rectangle Port 24° Magnum Head Specifications
    Head Torque w/Moly Lube 75 Ft. Lbs.
    Rocker Stud Torque 55 Ft. Lbs.
    Intake Port Gasket, 1.720'' x 2.450'' 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 375-17048 or 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 117cc Partially CNC Bowl Blend
    Intake Port Volume 305cc Partially 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:
    3050

    AFR's 305cc Intake Port Torque Monster!

    The smallest big block Chevy rectangle port intake volume runners in AFR's line-up, but don't let size fool you. This partially ported 305cc cylinder head features a CNC bowl & chamber blend that will provide you with flow numbers most medium sized cylinder heads (and some larger) can only dream about. This line was designed to optimize low and mid-lift airflow, while still generating impressive peak figures. The application should be focused on smaller cubic inch Big Blocks (396-502ci), with a primary operating range of 2500-6800 rpm's (this range is an average and will vary with engine displacement as well as component selection). These heads should also be given strong consideration in larger street driven or marine applications up to 555ci, where low rpm power and drivability are a factor. AFR 305cc cylinder heads would be a great choice if your looking for big torque, strong low rpm performance, and still have good rpm capabilities. The 305cc comes standard with AFR's trademark .750'' thick head deck, reinforced rocker stud bosses, and are equipped with premium one-piece stainless steel 2.250'' intake valves and 1.880'' exhaust valves. Standard combustion chamber volume is 117cc's on the 305cc partially ported heads. 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.

    305cc Rectangle Port Magnum Cylinder Head Features:
  • 50% Partially or 100% Fully CNC Ported Combustion Chambers
  • Bowl Blended Exhaust Ports
  • Bowl Blended Intake Ports
  • Competition 5-angle Valve Job
  • 305cc Intake Ports
  • Intake Valve, 2.250'' x 5.500'' Overall Valve Length
  • Exhaust Valve, 1.880'' x 5.448'' Overall Valve Length
  • 1.625'' OD PAC Racing Solid Roller Valve Spring, 275 lbs on seat, .850'' maximum lift
  • 10° Manley 4140 Chrome Moly Retainers
  • 10° 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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