Expansion Plug 203933 Parts Number 203933 Parts Name Expansion Plug 203933 Brand Cummins genuine parts Cummins Models GTA38, K38, KTA38GC CM558, QSK38 CM2150 K106, QSK38 CM2150 MCRS, QSK38 CM850 MCRS Related Posts Injector Seal 207244 O-Ring Seal – 145592 Aftercooler 4938507 Water Pump 3051408 Thermostat – 3076489