|
#8241122
World Sportsman II Small Block Chevy Iron Heads, Straight Plug
- Combustion chambers available in 64cc
- The rocker cover rails are fully machined
- Available with either angle, or straight spark plugs
Starting from
$1,897.98
/pair
In Stock
Quantity
Need Help? Call to Order
Add to a list
Select a vehicle to verify Fitment
Select Vehicle
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 | Select Type |
| Material Type | Cast Iron |
| Finish | Natural |
| Combustion Chamber Volume | 64cc |
| Intake Runner Volume | 200cc |
Need To Know
Need help?
855.313.9176Quick and Easy Returns
Return PolicyDetails
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 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.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.
Application
Parts selection and machine work for Assembled head are done by Speedway Motors Racing Engines.
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
Specifications
| KEY SPECS | |
|---|---|
| Brand | World Products |
| Cylinder Head Style | Select Type to see |
| Material Type | Cast Iron |
| Finish | Natural |
| Combustion Chamber Volume | 64cc |
| Intake Runner Volume | 200cc |
| GENERAL | |
| Combustion Chamber Volume Range | 60cc - 69cc |
| Intake Runner Volume Range | 200cc - 209cc |
| Spark Plug Style | Straight |
| Intake Port Shape | Rectangle |
| Exhaust Port Shape | Square |
| Intake Valve Diameter | 2.02" |
| Exhaust Valve Diameter | 1.6" |
| Sold in Quantity | Pair |
Ratings & Reviews
5
4 Reviews
Customers have lauded this product for its high quality and usability in projects. Buyers have found it as the perfect addition they required. Some highlighted that these heads provide substantial horsepower increase, and appreciated the inclusion of guide plates and stainless steel valves for regular unleaded gas. It's said to deliver better gas mileage and a notable power boost compared to competitors, particularly the GM stock heads. The product's superior performance is noted even with a mild cam, whilst saving cost that would otherwise be spent on aluminum heads. Some customers testified an impressive performance outcome with larger cams. The product is highly recommended for those pursuing serious power.
Ratings & Reviews
5
4 Reviews
Customers have lauded this product for its high quality and usability in projects. Buyers have found it as the perfect addition they required. Some highlighted that these heads provide substantial horsepower increase, and appreciated the inclusion of guide plates and stainless steel valves for regular unleaded gas. It's said to deliver better gas mileage and a notable power boost compared to competitors, particularly the GM stock heads. The product's superior performance is noted even with a mild cam, whilst saving cost that would otherwise be spent on aluminum heads. Some customers testified an impressive performance outcome with larger cams. The product is highly recommended for those pursuing serious power.
5
4 reviews
5
4
4
0
3
0
2
0
1
0
Filter by Ratings
Sportsman ll heads
5.0
4 years ago
The kid
Ste.Genevieve mo.
Verified
Exactly what I needed to finish my project . Very nice product , and would definitely buy again .
Would Recommend
3 days from starting motor , can't wait
5.0
6 years ago
Show var
Kansas city Kansas
Verified
Matches square gaskets nicelu
Would Recommend
Performance
5.0
7 years ago
Turtle
Holmesville, Nebraska
Verified
They said it will give me 30 to 70% more horsepower right out of the box, it remains to be seen! Came with guide plates, and stainless steel valves for regular unleaded gas. At least I hope so! Springs already installed with the valves, retainers and locks.
Would Recommend
The best cast iron heads out of the box!
5.0
8 years ago
Moose413
Burnet, Texas
Verified
The World Products Sportsman heads, right out of the box make more power, even better gas mileage, are better than any GM stock heads ever made! It's a difference you can feel in the seat of your pants! If you're running just a mild cam (you want some performance AND gas mileage), why spend big bucks on some aluminum heads when dollar for dollar, these heads will out perform the others by a long shot?!? But if you're after more serious, yet streetable power, You get even more response with bigger cams. These heads will embarrass the old "Feulie" heads Chevy made!
Would Recommend
Showing 4 of 4 reviews
Questions & Answers
Questions & Answers
17 Questions • 10 Answers
Are the race heads setup for hydraulic roller cams ?
by Jake
• 3 years ago
1 answer
View Answer
I'm building a oval track race engine a 406 4 inch eagle crank and 6 inch h beam rods 1.5 lifters and 406 late model solid roller cam and .30 over dome pistons will these heads be a good choice
by Dan
• 7 years ago
1 answer
View Answer
Will these heads work with my 1994 5.7 350 tbi chevy? I am planning on getting a raised single plain intake along with the street demon 750cfm carb and also a decent camshaft to run together would all of these work together??
by Stevie29
• 7 years ago
1 answer
View Answer
Will this work with a crane cam 274 h06
by Randall
• 7 years ago
1 answer
View Answer
What octane has would I have to run with a flat piston 350 with a xe268h cam and these heads?
by Caydon
• 7 years ago
1 answer
View Answer
This price is for a pair of world sportsman II heads,correct?
by rth
• 7 years ago
1 answer
View Answer
BUILDING A SBC 383 WITH COMP CAM HYD 268, IAM SURE I NEED TI PIC THE STRT IN THE ORDERING COMMENTS SECTION BUT I WANT TO BE SURE. THANKS JACK.
by JACK
• 7 years ago
1 answer
View Answer
Will the world sportman Ii heads bolt on my 1970 LT1 sb using my factory intake, and providing more hp than my double hump heads? I have comp cam 274 in the engine 490 lift . I have poly locks with stock rockers. Appreciate any advice for better performance for this street / strip but mainly street Z28 Camaro. 750 holly vac secondaries, 4:10 rear gear, Muncie m21 tranny.
by Shot
• 8 years ago
1 answer
View Answer
can you run a solid lift cam with a 510 lift using the strt head ?
by Jeffrey
• 8 years ago
1 answer
View Answer
I have an L code 350 190 hp sbc and on the street head I want to know if I can use stock push rods and rockers!
by Erickschilling
• 8 years ago
1 answer
View Answer
10 of 17 questions shown