Got my cat back exhaust today, only its not really cat back. They leave 3' of small diamater tubing after the cat and the collector. It is quality stainless steel and had a decent sound but i didnt really notice any power increase, and clearly the motor is still being choked.

Does anyone make downpipes for the 5.4L, or a "test" pipe to eliminate the cat?

 

Should have run true duals with an x pipe to "feel" a diffrence. Yes eliminate the cats.

 

who sells them for a 5.4

 

I think ngm said it well.

I dont think anyone makes a true dual kit, you would have to do it yourself.

 

So no one makes a stainless downpipe with highflow cats for the 5.4??

 

no one makes a bolt on peice for the ford trucks at all at this time.

I think that someone found one once, but it was crazy expensive.