Ford 2.3L Y5A Transit, Ultima, Galaxy competition valve set. These have head diameters of 34.5mm inlet and 30.75mm exhaust. These fit on the std. inserts. One piece stainless valves with waisted stems and back cut on the inlets. Plasma nitride finish for wear resistance and reduced friction. These accept the std. cottors and caps. Suitable for N/A or turbo use.