For High-RPM or Low-Compression engines****Our dished face valves are similar volume to OEM valves****35mm(Stock), 36mm(1mm), or 37.5mm( 2.5mm) Head D..
For High-RPM or Low-Compression engines****Our dished face valves are similar volume to OEM valves****30mm (Stock), 31mm (+1mm), or 32mm (+2mm) Head D..