Cummins ISX12, Engine Misc Parts, (GOOD USED/TESTED) Cummins ISX12 Engine EGR Valve 3688348 For Sale, Pulled Off a Cummins ISX15 Diesel Engine, Part # 3688348, Other Part # 1T176130069, 1T 176130069, 2IM, 322207B, Stock# 4866 | Tested & Inspected!