This is a Sources Sought notice for a Cylinder Head, Diesel (NSN 2815-00-789-1006, MFPN 05198203) issued solely for planning purposes and does not constitute a solicitation or commitment to procure. Interested sources must provide company details, DUNS/Cage Code, point of contact, size status, and a capability statement. Questions regarding this announcement must be submitted in writing by email to the Contract Specialist by August 13, 2026. No budget amount is specified, and the location for performance of services is not stated. The government will not reimburse response costs, and not responding does not preclude future participation in any potential solicitation.