Home / NISSAN / 350Z / / Cosworth CNC Ported Big Valve Cylinder Heads VQ35: FREE SHIPPING

Cosworth CNC ported cylinder heads feature dyno tested and flow bench proven ports, engineered for maximum usable 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 high performance applications and designed for excellent torque and turbo response.

These heads are compatible for both versions of the VQ35DE including the "Rev up" version.

Specifications:

CNC Ported/Machine finished port

Intake 19% (max) increased flow

Exhaust 22% (max) increased flow

4-angle Inlet Valve job

3-angle & radius Exhaust Valve job

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 edged port divider

Combustion chamber volume 58.5cc (OE approx 56 cc)