Cosworth 20000704 CNC Ported Big Valve Cylinder Head Mazda MZR 2.0L/2.3L
The 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 cylinder head is the key to making big power and will flow enough to support 300bhp.
- New OE Large port castings
- Machined port finish
- Knife edge port dividers
- Machined Cosworth Logo and serial number
- Oversize intake and exhaust valves
- Reshaped combustion chamber