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Jeremy Morris says: I had a few problems installing the intake, such as getting it to fit, one of the clamps were to small and I had a few extra peices.(uh oh) As far as performance goes I feel that I lost a bit of power ..
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Brendan Garvey says: This is the best exhaust for its price that I have ever used. The entire system is thin-wall stainless steel, so it is super light. With the silencer in this exhaust is incredibly quiet, then it screa ..
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Brendan Garvey says: This is one of the most critical small parts to add to your engine. Its not just a pretty part, if your timing belt goes you can say goodbye to your engine. These are made to reduce stretching at high ..
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Luis Carlos Sosa del Moral says: The AP short shifter worked very nice,it is precise and easy to install,VR service is excellent ..
5 of 5 Stars!


Cosworth Big Valve Cylinder Head Mazda Miata MZR 2.0L 2.3L 06-12
  • Cosworth Big Valve Cylinder Head Mazda Miata MZR 2.0L 2.3L 06-12
  Product Information
Price: $3,599.00   Sale: $3,365.07
  Model: 20000704
  Reviews:   
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Product Information
Cosworth Big Valve Cylinder Head Mazda Miata MZR 2.0L 2.3L 06+

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.

Includes
  • CNC Ported - 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


  • Picture is for representation only. Actual product may vary.
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    About Manufacturer: Cosworth
    Over the last 50 years Cosworth have developed an in-depth knowledge of engines, electronics and a range of high performance technologies. This has been used to supply some of the most successful motor sport teams and vehicle manufacturers in history.

    Our unprecedented success has fueled customer demand globally from diverse market sectors designing and developing technologies and components for aerospace, automotive, defense and sport applications.


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