KPMI, exhaust valve guide. Cast iron. STD

57-83 XL(NU)

Cast iron. Standard size: 0.5650" O.D. (14.35mm); 0.3085" I.D. (7.84mm); 1.77" OAL (44.96mm). Cast iron offers maximum durability and wear resistance for long distance touring. The standard since the invention of the piston engine.