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World Products 042660-1

Small Block Chevy S/R Torquer Cast Iron Cylinder Head 170cc Intake Ports

World Products 042660-1

955-042660-1

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World Products 042660-1 Small Block Chevy S/R Torquer Cast Iron Cylinder Head 170cc Intake Ports $558.13
Small Block Chevy S/R Torquer Cast Iron Cylinder Head
  • 170cc Intake Ports
  • 67cc Combustion Chambers
  • 2.020'' Int/1.600'' Exh Valves
  • 1.250'' Valve Springs, .500'' Max Lift for Hydraulic Cam
  • Assembled, Sold Individually

  • World Products 042660-1 Details

    Small Block Chevy 327-400ci S/R Torquer Cast Iron Cylinder Heads

    1.250'' single spring, 100# @ seat, .500'' max. lift, 2.02 x 1.600 valves, 170cc intake runner.

    Material: High density cast iron
    Valve Seats: Integral intake,hardened steel exhaust
    Valve Size: 2.020'' x 1.600'' (1.940'' x 1.500'' for S/R Torquer 305
    Accessory Flange: Stock locations, 7-bolt universal pattern

    Included In Assembly: Erson stainless steel, ring and band valve seals, valve springs, Erson 7° retainers and keepers.

    Recommended Installation Items:

    Head Gaskets: Fel-Pro #1003 (265-350) or equivalent.
    Puhshrods: OEM can be used. Hardened not required
    Screw-in Studs: 3/8" with 7/16"-14 base thread
    Pushrod Guidplates: These heads are not machined for guide plates. If desired Flat 5/16" Erson 601 or equivalent can be used after .125" is milled off the stud bosses and the push rod holes opened
    Spark Plugs: Accepts 14mm-5/8'' .460'' reach tapered seat (Accel 274 or 276, AC-Delco 43TS or 44TS, Champion #670 or #802) or equivalent
    Intake Gasket: Fel-Pro #1204 or #1256 or equivalent
    Exhaust Gasket: Fel-Pro #1404 or #1405 or equivalent

    Specifications:

    Accessory Bolt Holes Drilled
    Yes
    CNC-Machined Combustion Chamber
    No
    CNC-Machined Exhaust Runner
    No
    CNC-Machined Intake Runner
    No
    Combustion Chamber Volume (cc)
    67
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Cast iron
    Cylinder Head Style
    Assembled
    Damper Spring Included
    Yes
    Exhaust Port Location
    Standard
    Exhaust Port Shape
    Square
    Exhaust Valve Diameter (in.)
    1.6
    Exhaust Valves Included
    Yes
    Guideplates Included
    No
    Heat Crossover
    No
    Intake Port Location
    Standard
    Intake Runner Volume (cc)
    170
    Intake Valve Diameter (in.)
    2.02
    Intake Valves Included
    Yes
    Lock Style
    7 degree
    Locks Included
    Yes
    Machined for O-Ring
    No
    Maximum Valve Lift (in.)
    0.56
    Number of Springs Per Valve
    Single
    Oiling Style
    Through pushrod
    Outside Diameter of Outer Spring (in.)
    1.25
    Quantity
    Sold individually
    Retainer Material
    Chromoly steel
    Retainers Included
    Yes
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    Yes
    Rocker Arms Included
    No
    Spark Plug Style
    Straight
    Steam Holes Drilled
    No
    Valve Cover Mounting Style
    Center and perimeter bolt
    Valve Guide Material
    Cast iron
    Valve Guides Included
    Yes
    Valve Seat Machine Style
    3-angle
    Valve Seat Material
    Steel
    Valve Seats Machined
    Yes
    Valve Springs Included
    Yes
    Valve Stem Seal Style
    Positive stop
    Valve Stem Seals Included
    Yes
    Manufacturer's Part Number:
    042660-1

    Bolt-On Up To 30HP!

    An improved replacement for the factory Chevrolet 305-400ci cylinder head, World Products exclusive S/R Torquer series features 170cc intake runners and can provide up to a 30 HP increase over most OEM castings. Note, however, that these heads are accepted by many racing associations as ''stock'', and are 50-state emissions legal. S/R Torquer heads accept early and late model accessories. The valve seats are hardened to provide compatibility with unleaded gas. The S/R Torquer heads are available in 67cc and 76cc versions for engines up to 1986 and 76cc for 1987-later applications. They are designed to use 2.020'' intake and 1.600'' exhaust valves, and work well in engines from 302 to 400ci. World's S/R Torquer 305 cylinder heads come with 58cc combustion chambers, and are ideally suited for use on 262-307ci small blocks.

    Technical Specifications
  • Material: High density cast iron
  • Valve Seats: Integral intake, hardened steel exhaust
  • Valve Size: 2.020'' x 1.600''
  • Accessory Flange: Stock locations, 7-bolt universal pattern
  • Included In Assembly: Erson stainless steel, ring and band valve seals, valve springs, Erson 7° retainers and keepers.

    Recommended Installation Items
  • Head Gaskets: Fel-Pro 375-1003 or equivalent
  • Pushrods: OEM can be used, hardened not required
  • Screw-in Studs: 3/8" or 7/16" with 7/16"-14 base thread
  • Pushrod Guidplates: These heads are not machined for guide plates. If desired Flat 5/16" Erson 601 or equivalent can be used after .125" is milled off the stud bosses and the push rod holes opened
  • Spark Plugs: Accepts 14mm-5/8'' .460'' reach tapered seat (Accel 274 or 276, AC-Delco 43TS or 44TS, or equivalent)
  • Intake Gasket: Fel-Pro 375-1204 or 375-1256 or equivalent
  • Exhaust Gasket: Fel-Pro 375-1404 or 375-1405 or equivalent

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