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World Sportsman II Small Block Chevy Iron Heads, Straight Plug
World Sportsman II Small Block Chevy Iron Heads, Straight Plug
Chevy Small Block V8, Cast Iron, Natural, 64cc Combustion Chamber Volume
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World Sportsman II Small Block Chevy Iron Heads, Straight Plug
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Part # 8241122
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$854.99
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- 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
Details
Cylinder Head Style:
Select Type to see
Material Type:
Cast Iron
Finish:
Natural
Combustion Chamber Volume:
64cc
Intake Runner Volume:
200cc
Exhaust Runner Volume:
69cc
Combustion Chamber Volume Range:
60cc - 69cc
Intake Runner Volume Range:
200cc - 209cc
Exhaust Runner Volume Range:
60cc - 69cc
Spark Plug Style:
Straight
Intake Port Shape:
Rectangle
Exhaust Port Shape:
Square
Intake Valve Diameter:
2.020"
Exhaust Valve Diameter:
1.600"
Sold in Quantity:
Pair
Info
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)
Sportsman II Application Chart (GIF)
Please specify cam lift in comments section when ordering heads.
Assembled heads are built to order.
Item Details
Straight Plug, 64cc Chambers
Notes
Head Flow @ .600 Lift245 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.
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
Charts
824-1112 Instructions (PDF)
Important Messages
- Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
Some parts are not legal for use in California or other states with similar laws/regulations
What's In The Kit
Each kit from Speedway Motors is carefully packaged and delivered right to your door. Below is a list of all the items you should expect to receive when you order this kit. Some of these items may also be available for sale individually if you're here looking for replacement parts.
Select a Type above to see what items are in this kit.
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