6778 - Designed to pull injectors on a GM Duramax 6.6L engine, 2001 - 2004. Similar to J-44639.
6779 - for GM Duramax 6.6L engine, 2005 - 2011. Similar to J-46594.
7222 - For 6.6L duramax diesel engine 2001-2021. Similar to J-45910
7222 Injector Tube Remover specially designed to remove the injector tube for maintenance and re-installation. 6778 & 6779 Injector Puller used to safely pull the injector from the cylinder head without pulling the injector cup
One Year Warranty for it. If you have any problem ,please contact us and we will respond you on 24 hours