Mazda Miata 1.8L(BP056) 1990-1999 Race Master exhaust valves. 28mm head diam., .6mm stem diam., stock length 101.52mm O/A, 3.5mm tip length, 25° X 11/32" underhead angle/radius, .065" margin, .080" X 45° seat, 20° dish.
Mazda Miata 1.8L(BP056) 1990-1999 Race Master exhaust valves. 28mm head diam., .6mm stem diam., stock length 101.52mm O/A, 3.5mm tip length, 25° X 11/32" underhead angle/radius, .065" margin, .080" X 45° seat, 20° dish.