Alright guys looking into reruning the exhaust on my 5.4 3v. What do you guys think of dynomax bullets? Any hp gains? Mileage gains? Back pressure? I have true dual straights all four cats now. I wanna take the two rear cats out, maybe an xpipe and dynomax bullets? Think it'll make a difference.

 

The X pipe will help.... As far as sound goes, it should be a little louder.

 

Think itll help performance any?