World S/R Small Block Chevy Cylinder Heads, Straight Plug, 1.94/1.50

#824194

World S/R Small Block Chevy Cylinder Heads, Straight Plug, 1.94/1.50

The raised valve cover rails to eliminate oil leaks
Includes hardened steel exhaust seats for unleaded gasoline
They have extra-thick decks and walls for improved reliability

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Bare/complete:

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$599.99

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Product Summary

The raised valve cover rails to eliminate oil leaks
Includes hardened steel exhaust seats for unleaded gasoline
They have extra-thick decks and walls for improved reliability
Will accept early style perimeter or late model center bolt valve covers
These Small Block Chevy heads feature large intake & exhaust runners like double hump head

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Key Specs

Cylinder Head Style	Select Bare/complete and Comb.chamber
Material Type	Cast Iron
Finish	Natural
Combustion Chamber Volume	Select Bare/complete and Comb.chamber
Intake Runner Volume	170cc

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Details

More performance and less expensive than rebuilding used heads. No more searching junkyards looking for cylinder heads for your motor.Looks like the smog head on the outside, but has racing head features like an extra-thick deck, screw-in rocker arm studs, and raised valve cover rails.

Large intake & exhaust runners like double hump head
Extra-thick decks and walls for improved reliability
Hardened steel exhaust seats for unleaded gasoline
Machined for 3/8" screw in studs (included)
Raised valve cover rails to eliminate oil leaks
Accepts early style perimeter or late model center bolt valve covers
Can be milled for large springs
Assembled Heads Add:
- Heavy Duty S.S. Valves
- Steel Retainers & Locks
- 1.25" Hi-Po Valve Springs
- 3 Angle Valve Job
67 cc / 1.94 intake head is World Products # 4361
76 cc / 1.94 intake head is World Products # 4360

Head Flow @ .500 Lift
220 intake, 151 exhaust (Super Flow 1050)
232 intake, 161 exhaust (Super Flow 600)
All heads flowed with a standard .750" intake plate, without exhaust tube, and 28" of water.

Item Details

Straight Plug, 1.94/1.50 Valves

Application

Parts selection and machine work for Assembled head are done by Speedway Motors Racing Engines.

Charts

S/R Head Application Chart (GIF)

Installation Guide (PDF)

Specs

Casting ID Number: I-052, I-058
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: 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: 170cc, standard port location
Exhaust Ports: 65cc, standard location
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

Guides & Documents

Cylinder Heads Installation Instructions (824194)

Cylinder Heads Technical Information (824194)

CARB Warning

For race/ off road use only

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

CARB warning

Specifications

KEY SPECS
MFG. Part #	Select Bare/complete and Comb.chamber to see
Brand	World Products
Cylinder Head Style	Select Bare/complete and Comb.chamber to see
Material Type	Cast Iron
Finish	Natural
Combustion Chamber Volume	Select Bare/complete and Comb.chamber to see
Intake Runner Volume	170cc

GENERAL
Exhaust Runner Volume	65cc
Combustion Chamber Volume Range	Select Bare/complete and Comb.chamber to see
Intake Runner Volume Range	170cc - 179cc
Exhaust Runner Volume Range	60cc - 69cc
Spark Plug Style	Straight
Intake Port Shape	Rectangle
Exhaust Port Shape	Square
Intake Valve Diameter	1.94"
Exhaust Valve Diameter	1.5"
Sold in Quantity	Each

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Questions & Answers

13 Questions • 10 Answers

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4360 IMCA Sport Mod Legal?

by Boatman

• 3 years ago

1 answer

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With the 1.25 hi po springs What is the seat pressure open and closed Also are they single or double Thank you

by Mts

• 7 years ago

1 answer

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bulding a 383 sbc. -5cc dish piston need to know compression ratiio for the 76cc head and 67cc head

by jm

• 8 years ago

1 answer

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what I.D. & O.D. diameter springs are the bare heads cut for?

by nick

• 8 years ago

1 answer

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What is the approximate compression ratio that these heads produce. Thank you.

by SBC for me

• 8 years ago

1 answer

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Whats the max flow of the heads?

by Gregory

• 9 years ago

1 answer

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I have these same heads and need to replace a few valves what is a recommended set of valves for these heads.

by kaine

• 9 years ago

1 answer

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Can these heads be purchased with 577810107 valve springs?

by Chip

• 9 years ago

1 answer

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What is maximum.lift cam can run with the sorings that come with this head

by Justin

• 9 years ago

1 answer

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If I run a .531 .542 lift cam with these will I need .100 longer valves to get the spring height and spring pressure I need? What is the recommended spring height and pressure?

by Borsh

• 10 years ago

1 answer

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