Contains: Offset By-Pass ValveFits: Freightliner Cascadia, Century Class S/T, Columbia, Coronado, Business Class M2, Sterling L-Line, L-Line 9500, Western Star 4900EX, 4900FA, 4900SA Trucks all with Detroit Diesel DD13, DD15 or DD16 EngReplaces: Detroit Diesel A4721800109, A4721800309; Mercedes-Benz A4721800309, A4721840525; Donaldson P551005
