This Synopsis is notification that a Request for Proposal for a fixed firm price contract will be issued. ITEM 1: Diesel Engine. NSN: 2815-01-581-0635. P/N: 57k7250. BASE QTY: 16. OPTION: 16 FOB: Orig... This Synopsis is notification that a Request for Proposal for a fixed firm price contract will be issued. ITEM 1: Diesel Engine. NSN: 2815-01-581-0635. P/N: 57k7250. BASE QTY: 16. OPTION: 16 FOB: Origin. THE ESTIMATED ISSUE DATE OF THE SOLICITATION IS 15 SEP 2026 AND THE ESTIMATED OFFER DUE DATE IS 15 OCT 2026. ALL RESPONSIBLE SOURCES MAY SUBMIT AN OFFER WHICH WILL BE CONSIDERED