So I was thinking...

[Ziggyman]

And I was wondering what gains, if any, as far as mpg goes from cutting off my muffler. The exhaust already ends right after the muffler, and I know it will be louder, of which I don't care, but I was wondering if there would be a noticeable increase in mileage. And how would it affect my EGT's?

 

[bagpiperjosh]

i could be wrong. but i would think it would either do nothing to your mpg, or make it worse.

 

[Dieselcrawler]

Will make it go down at first, but after a little while you will see a slight increase if it is the factory muffler. Just a giant soot trap.

 

[heff]

I cut mine off and it felt a little snappier. However it sounded like total ass, I don't care what anyone says. So I put a small glass pack on it which still felt better than the og muffler but still had that annoying rappapapapa at higher rpms. So I replaced it with a big ol magnaflow muffler which felt even better across the rpm range than the glass pack. Just my experience with this.

 

[freebird01]

you really should stop that...thinking is a bad habit...

 

[OLDBULL8]

Every time I start to think, it gives me a headache, so I just go ahead and do what is on my mind, then see what happens.

 

[redneckaggie]

I have had about every na exhaust system possible and the best sounding is 4inch with a magnaflow

 

[7.3_IDI_guy]

I put obs psd straight pipe on one of mine from under the passenger seat back with a 5 inch tip and it sounded great

 

[FordGuy100]

Won't hurt it. The muffler that came off my truck felt like 100 lbs! Musta had a crap ton of carbon in it!