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World Products 042670

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

World Products 042670

955-042670

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World Products 042670 Small Block Chevy S/R Torquer Cast Iron Cylinder Head 170cc Intake Ports $324.66
Small Block Chevy S/R Torquer Cast Iron Cylinder Head
  • 170cc Intake Ports
  • 76cc Combustion Chambers
  • Cut for 2.020'' Int/1.600'' Exh Valves
  • Bare Head, Sold Individually

    *While Supplies Last*

  • World Products 042670 Details

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

    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)
    Rocker Arm Studs: 3/8'' shank, screw-in style with hex shoulder furnished(complete assemblies only)
    Accessory Flange: Stock locations, 7-bolt universal pattern

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    Recommended Installation Items:

    Head Gaskets: Fel-Pro #1003 (265-350) or equivalent.
    Puhshrods: OEM can be used. Hardened not required
    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:

    Manufacturer's Part Number:
    042670

    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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