onederful100

you wont see much power increase at all. the stock axle backs flow pretty well, so after market ones wont give much more hp, just better sound. and if you like the Loudmouth, i suggest you take a look at MBRP muffler deletes, they are much like the LM, but they are all polished 304 stainless steel from front to back, tips are 4", fitment was great, and they are a little cheaper.
http://www.ninosport.com/MBRP-Axle-b...=2&category=90

will

I just put the mid muffler on mine today...MUCH better

gman73

What exhaust set-up did you have before?

mustangtestuser

There have been some tests that show an insignificant gain with some axle backs. Muscle Mustangs and Fast Fords Magazine did one test that showed 3 hp and 1 ft lb over stock. You won't feel any performance difference at all.

There is some weight reduction to be had. Again, not enough to really feel. I know the stock exhaust weighs 32 lbs total and most after market mufflers weigh far less. My Ford Racing axle backs (rebranded Borla Stingers) weigh a total of 16 lbs. Every little bit helps, I guess!

mynameismike65

Dont waste your time on ny other setup, just get the Mac axlebacks. Very deep, louder then stock, classic v8 sound, excellent quality, great price. cant go wrong. (they do drone but its not like everyone makes them out to be)