Muffler Exhaust Gasket Fits Honda GX 120, GX 160 & GX 200, 4 HP, 5.5 HP & 6.5 HP, OEM # 18381-ZH6-800, 18381-ZH8-800, 50-425, 23-13520 Muffler Exhaust Gasket Replacement Fits Honda GX 120, GX 160 & GX 200 Muffler Gasket for Honda 4 HP, 5.5 HP & 6.5 HP OEM P/N# 18381-ZH6-800, 18381-ZH8-800 Replacement Part for 50-425, 23-13520