Turbochargers require oil lubrication, and that means tapping into the factory engine oiling system. To return the oil to the engine, it's necessary to puncture and tap the factory oil pan. Hellion includes the necessary punch and tap. After punching the hole, John coats the tap with grease to capture any metal shavings. With the hole threaded, John installs the return fitting. Once the kit is installed, its a good idea to change the oil before you fire up the engine to make sure any stray metal is washed away.