Loncin 242CC 270CC 337CC 346 357 389CC 420CC Gas Engine Intake Exhaust Valve Set
(A) Standard Intake & Exhaust Valves with a Wide Groove on the Valve Stem. Intake & Exhaust Valves with a Narrow Groove on the Valve Stem. Standard Intake & Exhaust Valves with a Wide Groove on the Valve Stem.