Ford Focus Cylinder Heads

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	Cosworth Big Valve Cylinder Head Ford Focus 2.0L 2.3L Duratec 03-07  Model Number: 20000691   View Price Cosworth Big Valve Cylinder Head Ford Focus 2.0L & 2.3L Duratec 03-07The Cosworth Duratec CNC ported Big Valve cylinder head is the result of countless hours of development and testing. Starting with fresh large port castings, we precision machine both intake and exhaust ports to maximize flow. We then reshape the combustion chamber to un-shroud the the larger stainless steel valves. The head is then assembled using our hi-rev tapered springs along with new valve stem seals and retainers. This c...