with cars, the exhaust is actually making a difference in the HP department. You pay a premium price to get premium results.

with these trucks, the exhaust is just fluffery to get noise...until you are running F/I like me. Then the exhaust is a HP killer (sorta).

If you want a quality exhaust to make power, you had better build it yourself. I don't think anybody offers a aftermarket exhaust for the F-150 that is actually worth a damn in the power department.