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AFR - Airflow Research 0911NP

180cc Eliminator Street Aluminum Cylinder Heads SB-Chevy

033-0911NP

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Ships 12/22/16 if Ordered Today
AFR - Airflow Research 0911NP 180cc Eliminator Street Aluminum Cylinder Heads SB-Chevy $1,387.10
180cc Eliminator Street Aluminum Cylinder Heads
  • SB-Chevy
  • 75cc Combustion Chambers
  • Straight Plug
  • Bare Head Only
  • Sold in Pairs, 2/pkg.

  • AFR - Airflow Research 0911NP Details

    Straight Spark Plug Design

  • 180cc Intake Port
  • 64cc Exhaust Port

    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.

  • Specifications:

    Accessory Bolt Holes Drilled
    Yes
    CNC-Machined Combustion Chamber
    Yes
    CNC-Machined Exhaust Runner
    Yes
    CNC-Machined Intake Runner
    Yes
    Combustion Chamber Style
    Heart
    Combustion Chamber Volume (cc)
    75
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Aluminum
    Cylinder Head Style
    Bare
    Damper Spring Included
    No
    Exhaust Port Location
    Raised
    Exhaust Port Shape
    Square
    Exhaust Runner Volume (cc)
    64
    Exhaust Valve Angle
    23
    Exhaust Valve Diameter (in.)
    1.6
    Exhaust Valves Included
    No
    Guideplates Included
    No
    Heat Crossover
    Yes
    Intake Port Location
    Standard
    Intake Port Shape
    Rectangular
    Intake Runner Volume (cc)
    180
    Intake Valve Angle
    23
    Intake Valve Diameter (in.)
    2.02
    Intake Valves Included
    No
    Locks Included
    No
    Machined for O-Ring
    No
    Oiling Style
    Through pushrod
    Quantity
    Sold as a pair
    Retainers Included
    No
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    No
    Rocker Arms Included
    No
    Spark Plug Style
    Straight
    Steam Holes Drilled
    No
    Valve Cover Mounting Style
    Perimeter bolt
    Valve Guide Material
    Bronze
    Valve Guides Included
    Yes
    Valve Seat Machine Style
    3-angle
    Valve Seat Material
    Ductile iron
    Valve Seats Machined
    Yes
    Valve Springs Included
    No
    Valve Stem Seals Included
    No
    Manufacturer's Part Number:
    0911NP

    The Small Port, High Velocity, Torque Monster!

    This Emissions Legal 180cc intake port small block Chevy eliminator cylinder head is available in your choice of straight or L98 angle plug versions and they are CARB certified EO #D-250-2 (versions from 1969-94 with heat riser). These performance heads feature a 75cc or 65cc combustion chamber with a 64cc exhaust port and a 3/4'' thick head deck (ideal for nitrous or blower applications.) Standard valves are lightweight 8mm diameter stem, 2.020'' intake and 1.600'' exhaust with AFR's hardened ductile iron interlocking valve seats. The exceptional flow characteristics, ideal operating range of idle to 5500 rpm (higher rpm ranges possible depending on combination of parts), 23° valve angle, and standard valve spacing make this the perfect street aluminum cylinder head for 327-350ci engines from 1955-86. Also available for 1987 to 1995 cast iron head engines with center bolt valve covers and 2 center intake bolts at 72° angle, AFR head p/n 033-919. No special parts are required. Dual valve cover bolt pattern is standard. Exhaust port and bolt pattern are raised 3/32'' over GM L98 cylinder heads, this rarely affects header or chassis fitment. Made in USA.

    180cc Eliminator Street Cylinder Head Features:
  • 100% CNC Ported Combustion Chambers
  • 100% CNC Ported Exhaust Ports
  • 100% CNC Ported Intake Ports
  • Competition 5-angle Valve Job
  • 180cc Intake Ports
  • 64cc Exhaust Ports
  • Bead Lock Intake Valve, 2.020'' x 4.903'' Overall Valve Length
  • Bead Lock Exhaust Valve, 1.600'' x 4.955'' Overall Valve Length
  • PAC Racing Valve Spring: 1.290'' OD Hydraulic Roller Dual Valve Spring, 135 lbs on seat, .600'' maximum lift
  • 7° Manley 4140 Chrome Moly Retainers
  • 7° Bead Lock Valve Keepers
  • 3/8'' Rocker Studs
  • Adjustable 5/16'' Guide Plates
  • Viton Valve Seals
  • Hardened Spring Cup
  • Intake Valve Seats
  • Exhaust Valve Seats
  • Bronze Valve Guides
  • Standard Exhaust Bolt Pattern, Accepts Factory and Aftermarket Headers

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