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Cosworth: CNC Ported Big Valve Cylinder Head: Evo IV - VIII

Cosworth: CNC Ported Big Valve Cylinder Head: Evo IV - VIII

Stock CodeCOS/KK3672


Ships In 3-5 Days

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 10,500 rpm) valve springs with titanium retainers and are ready to install. Perfect for big turbo applications. A flow chart for the modified head is available by downloading the technical document on the left.

Specification:

CNC Ported/Machine Finished Port - New OE Castings.
Hand blended finish work.
Intake: 26% Increased Flow (Max).
Exhaust: 18% 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.
Reshaped combustion chamber.

For Evo Models IV - VIII.

Stock images used. Actual product may vary.

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