Detroit Diesel DD15 Application High quality aftermarket replacement part Proper material selection based upon pressure, temperature variations and contact with many fluids and surfaces- helping your engine have excellent performance. It complies or exceeds OEM quality performance. 631368 A4720780080 A4720780180 A4600700987 621249 Upon Purchase The parts may vary Between Interstate-McBee or PAI Industries, If you desire a specific brand, please inform us prior to placing your order. With REDiesel, you will receive High-Quality Parts for you Engine from well established brands. 6 Pc Detroit Diesel DD15 injector line seal / injector line gasket This is an OEM-quality part that meets or exceeds OE specifications