StalkerStang

I've always loved flowmasters. Over stock, there will be gains.

You may gain a bit more with other muffler brands, but I would say thats debatable at the power levels most bolt-on trucks are dealing with. If there is a loss, I can't imagine it being more than several HP.

If you are forced induction, then it may be more beneficial to go with a straight through design.

Vincentf150

Thanks for all yalls inputs they were very helpful. I finally went with the flowmaster super 40 and it sounds freaking awesome.