This Cosworth MX5 cylinder head is the key to making big power and will flow enough to support 300bhp. Picture supplied by Cosworth is not the exact part. Cosworth CNC ported MX5 cylinder heads feature dyno tested and flow bench proven ports, engineered for maximum usable power. Each new MX5 Miata 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 MX5 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 MX5 Miata applications.
NOTE: These require an 8 week build time from date of order.
About Manufacturer: Cosworth Over the years we have developed in-depth knowledge of engines, engine components and engine management systems. This has been successfully used to supply engines to some of the most successful Formula One teams and vehicle manufacturers. Our unprecedented success in the performance market has fueled customer demand from diverse market sectors. In addition to the traditional markets, Cosworth is engaged in designing and developing, engines and components for marine, locomotive and aerospace applications.