Black Sunshine 07

all this time i've been thinking that with the new mustang's, changing the mufflers would make no difference in power. maybe pick up 1 HP. but on some web sites corsa and borla are actually claiming to make 7-10% increase in HP. one site even claimed 13 HP. your thoughts...

Arwing

13hp? I highly doubt that. if you want more hp, you don't go with axle backs.....

Now some people say that you may actually lose hp...some say with the slp lm's you lose up to 4-7....but i dont think thats right. there was a big thread a while back on that subject...

CrazyAl

Well, on SOME cars an HP gain from Axle-backs does happen, so perhaps these sites are quoting generic information. However, on the 05+ Mustang there is no real power to be had. Like you said, MAYBE +1 HP, but I wouldn't count on it.

Stang Skeleton

With JUST mufflers alone (ie axlebacks) you will probably get about 2-3 hp or so. The websites that claim 13hp etc probably have axlebacks coupled with a midpipe or have been tuned etc.

Norse1974

+1 on that!Only 1-3 Hp if any!But hey,if your trying to squeeze every ponyyou can from a N/A motor then so be it......At least you get better sounds from the **** end of the car!

Riven02

With stock exhaust thebottle neck isnot the mufflers. However, at some point it might become the limiting factor. Maybe with LTs OR mid pipe? I honestly dont know at what point it would become the limiting factor. I have never seen a dyno that shows a before and after comparison on a car with full bolt ons or a FI car. There is no way a stock muffler can flow equal to a stinger.

06stangGT

We gain it in our heads !!

Black Sunshine 07

the SLP loudmouth is the axle backs i was leaning towards getting. has anyone experienced a power loss after adding SLP's?

Riven02

There is no way they lose HP. It makes no damn sense. By the logic that backpresure is a good thing, I must be loosing at least 25hp with my LTs and HF CATS.

Zellanor

"DUDE YOUR CRAZY, YOU'VE GOT A DART IN YOUR NECK"

OLD SCHOOL