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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

Key Specs

Cylinder Head Style
Material TypeCast Iron
FinishNatural
Combustion Chamber Volume
Intake Runner Volume170cc

Need To Know

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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

Charts

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

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.

Specifications

KEY SPECS
MFG. Part #
BrandWorld Products
Cylinder Head Style
Material TypeCast Iron
FinishNatural
Combustion Chamber Volume
Intake Runner Volume170cc
GENERAL
Exhaust Runner Volume65cc
Combustion Chamber Volume Range
Intake Runner Volume Range170cc - 179cc
Exhaust Runner Volume Range60cc - 69cc
Spark Plug StyleStraight
Intake Port ShapeRectangle
Exhaust Port ShapeSquare
Intake Valve Diameter1.940"
Exhaust Valve Diameter1.500"
Sold in QuantityEach