This is a Sources Sought notice seeking potential suppliers for 65 Backplane Assemblies, with an option for 65 more, for the Abrams Fighting Vehicle engine. The government lacks the technical drawings and full data rights needed for a standard competitive procurement. The purpose is market research to identify other possible sources, and this is not a formal request for proposals. Interested contractors must qualify through the Source Approval Program, including vehicle-level testing at their own expense. The performance location and budget are not specified.