Stainless steel exhaust valve undercut for high flow. Micro polished stems for reduced friction. Lighter and stronger than stock valves. Must use lash caps 14160 and our retainer/keeper set 16360. This is a stock size valve for the Honda GX160/200, 196cc clones and the Non-Hemi 212cc Predator (1st & 3rd Gen). Every high performance racing application needs stainless steel valves. Stock valves break.