I have an '05 2500 with the 5.7... looking to do some upgrades and would like some input...I am looking at the Gibson Super Truck Exhaust, mostly because it will open it up a bit and looks kinda sweet... but I have heard that this will rob torque, but by how much? Does it pay off with the horsepower gains? Additionally, I am looking at a K&N CAI but have been reading how it can jam up the engines computers due to airflow being determine by mass vs volume or flow or something like that. An help would be great.

 

Decent but not too big exhaust
Programmer
Mixed reviews on the various CAI's
Gear change for acceleration/towing power
6.1 cam

Drop several grand for a 6.1 or 392 (or the Indy cyl head 426 version)