Is a 5.9 Grid Heater Delete Actually Worth It?
If you're looking to squeeze every bit of efficiency out of your Cummins, doing a 5.9 grid heater delete is likely one of the first things people will suggest in the forums. It's a classic "weekend warrior" modification that promises better airflow, lower exhaust gas temperatures (EGTs), and a cleaner engine bay. But, like anything in the diesel world, there's always a trade-off. Before you go tearing into your intake manifold, it's worth looking at why that heating element is there in the first place and what happens once it's gone. ...