EGR system failure is probably one of the most common issues on the 6.0. A delete kit as a few major benefits
1. You will be removing the EGR cooler which means your removing a heating element for the coolant. Which allows the coolant to run cooler and faster threw the motor.
2. Deleting a clogged cooler greatly reduces your chances of over pressurizing the coolant system and blowing your head gaskets
3. Depending on the year of truck you will notice faster turbo spool due to the fact that the factory up-pipe has air flow scoops to divert some of the flow into the intake.
4. With out the factory egr cooler and factory up-pipe you will not be forcing hot exhaust gases back into the motor.
Basically without the factory egr system the motor, exhaust gases, and coolant are flowing correctly and faster just the way a motor should run.
Sinister MFG Company