If you own a Cummins K19 KTA19 QSK, you'll want this Injector Cup. Part number 3279720,it even replaces 3279765 if you need it to. It's tough, fits like a glove, and installs in no time. I've used these before,they last forever and keep the engine running smooth. Great for trucks, construction equipment, or generators,any heavy-duty use.