Cummins ISX15, Engine Misc Parts, (GOOD USED) Cummins ISX15 Metering Orifice, Heat Shield, & Exhaust Connector For Sale, Orifice Part # 3685948, Exhaust Connector Part # 3686375, 21J1, Heat Shield Part # 3686501, 3034111, Stock # 6252 | Tested & Inspected!