The muffler delete might have helped with power on the older trucks. Doing this on a 2004.5 and up with factory 4" exhaust from the turbo back seems like a waste of money.
I always recommend a steering stabilizer for Dodge trucks. The steering box can flex on the frame. This translates to wondering on the road.
Genos Garage![](http://www.genosgarage.com/images/BD-1032005.gif)
Have him check under the hood for a lube sticker for the front driveshaft. Some truck front drivelines do not require lubrication. Mine does. This lube job requires a needle fitting for the grease gun. Many dealers including mine do NOT lube this fitting with a normal oil change. They should.
![](http://www.dieseltruckresource.com/forums/attachments/3rd-gen-engine-drivetrain-2003-2007-102/17458d1196918464-cant-find-drive-shaft-grease-fittings-frntdrivelubept.jpg)
Gauges help (boost,egt,fuel pressure,tranny temp). Always use quality filters. Avoid cheap filters that do not "Meet or Exceed OE specifications". As mentioned be sure the computer updates are completed.