Exhaust
#4
Truck Enthusiast
Besides being a waste of money they may cause your exhaust pipe to get too hot. Ford spent a good amount of time trying to get the tailpipe designed correctly to avoid fires, damaging adjacent parts, etc as it reaches 1200+ degrees F when regenerating. Now, if you are going with a DPF and EGR delete then straight pipe your truck and you will get some performance gain (as much as one can get from an exhaust system).