Turbo Oil pressure & drain "figure 8" seal for 6.5L diesel engines equipped with center-mounted GM6 & GM7 Turbos. Made of pliable high quality (oil resistant) rubber. Common applications for this seal include: GMC & Chevy Vans and P-series chassis, Grumman Workhorse chassis and Civilian H-1's and Military HMMWV's with the 6.5L turbo diesel engine. This part is sometimes showing as discontinued through AM General & GM. GM # 12561306 / 12560385 AM General # 10218787 NSN# 5330-01-484-1471 NIIN# 014841471 Government Catalog description: "Seal turbocharger / Supercharger Turbine"