Subject: Re: Unknown cylinder head by ddgonzal on 2015/3/22 4:02:20
H89 is the best street cylinder head: * Closed chambers for best power and fuel economy * bigger valves than GX head * Water passages below the intake ports
Two versions: * Oval ports for high-RPM power * Round-port for lower HP at 5600 RPM. With additional casting number '928'
