1999 Mack E7, Truck Delivery, Mufflers, Fits to: Mack RD688S, (Used) 1999 Mack RD688S, MUFFLER/ STACK- Side: Passenger Side, Material: Stainless Steel, Engine: Mack E7-350, 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# TBD, Casting# TBD, Truck Year 1999 1M2P267C0XM043425