Airific

for the time being, if i drive my d15 with only stock headers, stock cat, and all piping stock with the muffler removed, will it effect my gas mileage? just a quick question, and i would appreciate any feedback. -Thanks

ccjustin

I'd imagine it would make it slightly better on gas, slightly. but way too loud

98_4drCivic

it probably won't affect it, but for the love of imports PLEASE put a muffler on it.

egcivic

my muffler got ripped off when i swapped a new engine cuase mine blew, and i drove it for a week and it sounded like hell. no it didnt affect my mpg, cuasemy mpg is the same now wiht a muffler.. but again it sounded absolutely terrible, ppl would come out of their house to ask me to move my car, and i felt like a big dick...
so if you have any concern for the rest of the people in you neighborhood plz muffle it

-Gary-

You'll find your gas mileage to be worse because you'll get into it a little more. Think open-pipes-on-a-Harley-loud but out-of-place on a civic.

Mistermark

yea my exhaust broke a month ago, right before the muffler, and it sounded SOOOOO loud, even if it improves gas mileage a tiny bit, i rather drive quiet

mwieczorek43

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mistermark &raquo;</TD></TR><TR><TD CLASS="quote">yea my exhaust broke a month ago, right before the muffler, and it sounded SOOOOO loud, even if it improves gas mileage a tiny bit, i rather drive quiet</TD></TR></TABLE>

I'd guess it'd actually hurt mpg. You'll have less low-end due to lack of back-pressure... meaning you'll need more/higher revs to get the same results just putting around town. this is just a guess...