Exhaust system Question

[tah0e02]

If i were to change the stock muffler to a flowmaster muffler.... would i still get the mpg increase ? Or do i have to get the whole complete system?:mpr:

 

[Jsho13]

I would think that all you would gain is noise. The whole system is designed to flow better than stock hence no mpg gain.

 

[SPXTrader]

Gas mileage loss...because it will sound so good you'll wanna keep your foot in it!

 

[Polecat]

I added one to mine, couldn't tell a diffeence, other than sound, which was the more reason I wanted it anbyway. BUT, if you do the complete catback, you might.

 

[tah0e02]

I would think that all you would gain is noise. The whole system is designed to flow better than stock hence no mpg gain.

thats what i was thinking... so the best thing to do is get tha whole system i guess. If i really want it to be efficiant and not just loud.

 

[6liter]

I think that there will be some increase as the stock muffler is much more restrictive than any performance muffler.
I wanted to try changing just the muffler on my Denali but my local muffler guy didn't want to do it so I bought a Magnaflow cat back system and have absolutely no regrets.

 

[SapperRyash]

i would think you wouldnt get any MPG gain with just a new muffler. the reason is, the new muffler might be less restrictive but as soon as it leaves the muffler its still going to hit the stock pipping. i would just bite the bullet and go with a whole new system. here is mine.http://www.tahoeforum.com/showthread.php?t=7154