Lotus Twin Cam. Inlet Valves 1.625 or 1.7 Stainless Steel. We stock these in two lengths which suit most heads and applications, they feature a head size of 1.625in (41.2mm) or 1.7 with a standard stem of 5/16 inch diameter. The valves have a standard single groove. They are made from stainless steel and have "necked down" stems.
