CFE 11 Degree Spread Port - Designed for Naturally Aspirated or Turbo Charged Racing Engines.

CFE 11 degree spread port heads are available assembled or bare. Assembled heads are delivered standard with Victory titanium valves and Manley Nextech valve springs (.900 lift). Substitutions available for an additional charge.

CFE 11 Degree Spread Port Base Programs:

• Square port program designed for large displacements - over 600 C.I.D. Fabricated Sheet Metal Manifold is Recommended.
• Oval Port Program intended for displacements under 600 C.I.D. with a single cast 4bbl intake manifold.
• Oval Port Program Engineered for displacements under 600 C.I.D. with 2 x 4 bbl tunnel ram manifolds.

CFE 11 Degree Spread Port Features:

• Up to 2.500" Intake Valve Diameter
• Up to 1.880" Exhaust Valve Diameter
• 11/32" valve guides are standard
• Combustion Chamber volume of 87cc
Note: Can be machined to approximately 65cc in most applications. CNC Program for the combustion chambers is based on a 4.600" bore diameter. Custom chamber programs for smaller bore diameters are available upon request for an additional charge.

CFE 11 Degree Spread Port Requirements:

• Requires 4 left-hand .180 offset lifters and 4 right-hand .180 offset lifters for intake. On-center lifter can be used for exhaust.
• Utilizes a standard big block chevy header flange.

CFE 11 Degree Spread Port Options:

• Available with ductile or alloy valve seats.
• 5/16" valve guides
• Rocker arm kits are available from Jesel and T&D:

Jesel Part Numbers

• 11 Degree CFE Spread Port - KPS-24347

T&D Part Number

• 11 Degree CFE Spread Port - 3037