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*DISCONTINUED* Cosworth CNC Ported Big Valve Cylinder Heads with KK3766 Camshafts for 2007 Subaru Impreza WRX, STi EJ25 (2.5L) - [USDM]

Cosworth CNC Ported Big Valve Cylinder Heads with KK3766 Camshafts for 2007 Subaru Impreza WRX, STi EJ25 (2.5L) - [USDM]
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Cosworth CNC Ported Big Valve Cylinder Heads with KK3766 Camshafts for 2007 Subaru Impreza WRX, STi EJ25 (2.5L) - [USDM]
List Price: $99,999.99
Our Price: $99,999.99
Sale Price: $99,999.99


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Product Code: 20002024

Description
 
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Cosworth CNC Ported Big Valve Cylinder Heads w/ Camshafts for the 2007 Subaru Impreza WRX, STi EJ25 (2.5L) - [USDM]
Cosworth CNC Ported Big Valve Cylinder Heads with Camshafts for the 2007 North American Subaru Impreza WRX, STi with the EJ25, 2.5 liter motor are designed for high performance and maximum horsepower and torque. 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. These heads include our S2 version camshafts (KK3766) with the correct cam followers included. This is the perfect head/camshaft combination for serious performance and track day use.

These heads are for the 2007 North American models equipped with the air injection feature in the exhaust ports.
Features
  • CNC Ported/Machined finish port
  • New Castings
  • Hand blended finish work
  • Intake 14.63% (average) 22% (max) increased flow
  • Exhaust 30.56%(average) 41% (max) increased flow
  • 4-angle Inlet Valve job
  • 3-angle & radius 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 edged ports
  • Includes S2 Camshafts and cam followers installed

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