Champion Spark Plug, Shielded, Single Fine Wire Electrode, Iridium. This Spark plug has 18MM Thread size and 3/4-20 Shielding Thread at Ignition Harness Connecting End.
Please note: Opened Plastic Spark Plug Packages are not returnable. Please confirm you have received the correct spark plugs for your application before opening package.

MIL-DTL-6000D-1-1/2 Oil and Coolant Aviation Hose MIL 6000 Series | 1.5 Inch Inner Diameter 