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World Products Small Block Chevy S/R Torquer Cast Iron Cylinder Heads


World Products
World Products Small Block Chevy S/R Torquer Cast Iron Cylinder Heads

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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


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

    955-042660
    Small Block Chevy S/R Torquer Cast Iron Cylinder Head
  • 170cc Intake Ports
  • 67cc Combustion Chambers
  • Cut for 2.020'' Int/1.600'' Exh Valves
  • Bare Head, Sold Individually
  • $315.99
    Order Today Ships 09/09/14

    955-042660-1
    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, .560'' Max Lift for Hydraulic Cam
  • Assembled, Sold Individually
  • $525.99
    Ships

    955-042670
    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*
  • $315.99
    Order Today Ships 09/09/14

    955-042670-1
    Small Block Chevy S/R Torquer Cast Iron Cylinder Head
  • 170cc Intake Ports
  • 76cc Combustion Chambers
  • 2.020'' Int/1.600'' Exh Valves
  • 1.250'' Valve Springs, .560'' Max Lift for Hydraulic Cam
  • Assembled, Sold Individually
  • $542.99
    Ships

    4 Products