View 4 Photos View 0 Videos 1999 Mack MR688S Engine Mount $175 USD Good Used, Mack, E7-300, Front Engine Mount. Casting Number on part is (158GB553). (Engine S/N#. 9d3767). Please see pictures. Please call or email with any questions., Air/Hydraulic: Other,... ConditionUsedEngine ModelMack E7-300Fits To Make(s)MackFits To Model(s)MR688SWill Fit Year(s)1999Part NumberP-4777Stock NumberP-4777 MLS Number9635287CategoryEngine Mounts Last Updated12/18/2023 LocationKankakee, IL, US Sold ByRiver Valley Truck Parts (844) 604-___ SHOWNUMBERCall Seller Email Seller Save More Info