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Product Summary

  • Combustion chambers available in 64cc
  • The rocker cover rails are fully machined
  • Available with either angle, or straight spark plugs
  • Engineered to provide 30-70 horsepower gains over OEM heads
  • Features a higher, wider, raised roof intake runner with improved short turn radius

Key Specs

Cylinder Head Style
Material TypeCast Iron
FinishNatural
Combustion Chamber Volume64cc
Intake Runner Volume200cc

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Details

The industry’s most popular true high performance cast iron cylinder head has been continuously improved since its introduction over 20 years ago. With 200cc intake and 69cc exhaust ports, World’s Sportsman II heads offer 30-70 horsepower gains over OEM heads, yet are 50-state emissions legal.

  • Bolt on from 30 to 70 additional H.P. (Dyno Proven)
  • Combustion chambers available in 64cc
  • Available with either angle, or straight spark plugs
  • 200cc intake runners
  • Fully machined rocker cover rails
  • Higher, wider, raised roof intake runner with improved short turn radius
  • 50-State Emissions legal
  • Recommended spark plug is a 14mm-5/8", .460" reach with a tapered seat
  • STRT assembly: Valve springs suitable for Hydraulic lifter cams up to 0.550" lift (includes spring # 180-671515)
  • FLAT assembly: Valve springs suitable for Solid lifter cams up to 0.650 lift (includes spring # 915-99893)
  • RACE assembly: Valve springs suitable for Solid Roller cams up to 0.680" lift (includes spring # 915-99876)

Please specify cam lift in comments section when ordering heads.

Assembled heads are built to order. 

Item Details

Straight Plug, 64cc Chambers

Head Flow @ .600 Lift
245 intake, 165 exhaust (Super Flow 1050)
260 intake, 176 exhaust (Super Flow 600)
All heads flowed with a standard .750 " intake plate, without exhaust tube, and 28 " of water.Head Flow @ .600 Lift
245 intake, 165 exhaust (Super Flow 1050)
260 intake, 176 exhaust (Super Flow 600)
All heads flowed with a standard .750 " intake plate, without exhaust tube, and 28 " of water.

Charts

Specs

  • Casting ID Number: I-037
  • Material: High density cast iron
  • Valve Seats: Intake (integral), exhaust (hardened)
  • Valve Guides: Integral cast iron
  • Spring Seats: Machined for 1.560" and 1.250"
  • Valve Diameter: 2.020"" intake, 1.600" exhaust (11/32" stem)
  • Rocker Arm Studs: Screw-in style
  • Rocker Arms: 1.5 ratio (use of 1.6 ratio will require elongation of pushrod holes)
  • Intake Runner: 200cc, standard port location
  • Exhaust Ports: 69cc, standard location
  • Combustion Chamber: 64cc, straight or angled plug orientation
  • Spark Plug: 14mm 5/8" .460" reach tapered style
  • Valve Job: Multi-angle intake and radiused exhaust
  • Valve Cover Rail: Raised w/ perimeter and center bolt pattern
  • Valve Angle: Stock 23°
  • Accessory Bolt Holes: Stock

Specifications

KEY SPECS
BrandWorld Products
Cylinder Head Style
Material TypeCast Iron
FinishNatural
Combustion Chamber Volume64cc
Intake Runner Volume200cc
GENERAL
Exhaust Runner Volume69cc
Combustion Chamber Volume Range60cc - 69cc
Intake Runner Volume Range200cc - 209cc
Exhaust Runner Volume Range60cc - 69cc
Spark Plug StyleStraight
Intake Port ShapeRectangle
Exhaust Port ShapeSquare
Intake Valve Diameter2.020"
Exhaust Valve Diameter1.600"
Sold in QuantityPair