While climbing around under the truck I noticed that the exhaust pipe coming off the right manifold is about 1/2 its diameter going into the collector. Its crushed by the factory. Cant be good, I have never seen a collector pipe this flat. It has to be a restriction.

 

im going to keep my eye on this post. i noticed it to kinda odd, you know as soon as you change it with a Y-pipe or something similar the trucks computer is going to notice the change and either throw a code or burn up the O2 sensors.

 

i dont see why it would throw a code since its after the cats. but even if it does, if you have a superchips programmer, you should be able to fix it i would think.