Heads

CFE 18 Degree N2O Specials

Spreadport BBC

CFE 18 degree Nitrous Specials incorporate all the same great features as our standard 18 degree spreadport head with additional influences from our record setting five-inch-bore-spaced promodified heads. Custom chamber design and valve locations enhance not only the performance of the head, but allow for a much improved piston design for nitrous use. This head is available in both 4.840 and 4.900 bore spacing and will require a custom piston design specific to the CFE Nitrous Special. Competitive programs are available to support engine ranges from 598 c.i.d to 706 c.i.d. CFE also offers manifold specific programming for either cast or fabricated intakes allowing for a completely custom racing head solution.

CFE Nitrous Specials can take advantage of most your existing 18 degree Big Chief components such as head-studs, gaskets, rocker arms, and valve covers.

Cylinder Head Specifics

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Intake Valve Diameter:2.400"
Exhaust Valve Diameter:1.880"
Chamber Volume:97cc
Seats:Alloy intake and exhaust seats are standard
Guides:11/32" alloy guides on both the intake and exhaust or standard.
Exhaust Flange:Accepts a standard Big Block Chevy header.
Cooling Provisions:The CFE 18 degree Big Chief head has cooling provisions on the intake flange. Coolant holes for a -16AN fitting can be added to the end of the casting upon request.

Cylinder Head Requirements

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Minimum Bore:4.600"
Intake Manifold:Cast single dominator or tunnel ram manifolds are available for 9.800 or 10.200 deck heights.
Exhaust Lifters:Qty 8 @ on-center
Valve Cover:Requires a standard Big Chief valve cover and valve cover gasket.
Shaft Rocker System (required)
Jesel:KPS-23097
T&D:3036
Head Stud Part Number:235-4312
Spark Plug:3/4" reach gasketed spark plug
Assembly Components:Call for details

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