I just did mine and egts dropped a little and it really cleans your intake. My truck had 165,XXX on it when I did mine and it was awful looking. It took me forever to clean my intake. It will be so much better for your truck. Also now is a good time for a pcv re-route. There is a DIY thread on it.
04LLY. K&N Intake- EFI Live 5 position by IdahoRob-Sinister Diesel EGR Delete- PPE stage V tranny- Triple Disk Converter- MBRP 5 inch Stainless to an MBRP Monster 8 inch tip- resonator plugged- 3 inch intercooler pipes- Profab y-bridge- S&B mouthpiece-FASS 150gph- Autometer Sport Comp 2 Pyro and Boost guages- Cognito leveling kit and UCA's- PPE Tie Rod Sleeves- Empire Diesel Center Link- Rough Country Add-a-Leaf- Bilstein 5100's Front and Rear- homemade traction bars-Mickey Thompson ATZ 285/75/R16