For a limited time, we are offering FREE SHIPPING on Cosworth Big-Bore Cylinder Heads!
 
Cosworth CNC ported cylinder heads feature dyno tested and flow bench proven ports, engineered for maximum real world power.
 
Each new cylinder head is ported on a 5 axis machine to ensure consistency and perfect port shape every time.
 
Additionally, larger intake (+1mm) and exhaust valves (+1mm) are utilized to help increase flow. Cosworth CNC ported Big Valve cylinder heads come complete with a performance valve job, hi rev (max 10,500rpm) valve springs with titanium retainers and are ready to install.
 
Perfect for big turbo applications.
 
Subaru heads are priced for the pair.

Specification

    * CNC Ported/machine finished ports - New OE Castings
    * Hand blended finish work
    * Intake 22% Increased Flow (max)
    * Exhaust 41% Increased Flow (max)
    * 4-angle Inlet Valve job
    * 3-angle & radiused Exhaust Valve job
    * Valves are lapped
    * Back-Cut Inlet Valves
    * Heads are Ultra Sonic cleaned prior to assembly
    * Heads are Serialized and sport a machined Cosworth logo
    * +1mm Stainless Steel Intake Valves (1800 degrees max.)
    * +1mm Inconel Exhaust Valves (2400 degrees max.)
    * Performance Valve Springs
    * Titanium Retainers
    * Hardened Steel Spring Platforms
    * Knife Edge port divider

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