0 PACCAR MX13, , Engine Misc Parts, Fits to: , (Used) 2011 PACCAR MX13, ENGINE BRAKE/ EXHAUST BRAKE- Part Number: KS20031802R ENGINE INFORMATION- Family Number: BPCRH12.9M01, Serial Number: Y008542, Reference images for condition, For more information about this item, give us a call. We ship Worldwide!. (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY. ELKTON, MD 21921., Serial# Y008542, Part# KS20031802R,