Detroit Diesel Fuel Injector Line Passthrough Seal | Genuine OEM (A4720780680). Part Number: DDE A4720780680. Supersedes / Cross-Reference: A4720780180, A4720780480, PAI 631368. Also known as an injector line passthrough seal or adapter seal, this critical rubber-composite gasket prevents fuel and combustion gases from escaping, maintaining the high-pressure integrity required for modern diesel engines.
