Mufflers actually muffle the sound of the exhaust. The stock muffler is restrictive so opening up airflow passage is good. Unfortunatly unless your civic is turbocharged, supercharged, or running some kinda crazy compression you wont see any performance gains. If you want to bypass the whole system itself, you can get an exhaust cutout, its loud as hell but i think it shows the most hp gains but you would have to delete your rear o2.
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Racing isn't a Hobby, Its a Business
2005 Evolution 8
-Precision Engineering Head
-Built Long Block
-ATP GT30R Turbo Kit
If your talking about stock mufflers, they are there to muffle the sound the engine makes, broken or open mufflers (aftermarket) let the sound come out a lot more because they arent restricted and will give a little better performance (dont expect to be killing mustangs)
I currently have stock exhaust... the really basic one. If i get a new exhaust that lets more exhaust out, would that be good for engine and stuff?
BTW, if i usually drive at 50 to 60 MPG, how would leaving the moon roof open do to the gas millage?? gas is super expensive now
if you're that desperate to save money, i suggest just cutting back on driving in general, or cutting back on the cheeseburgers. an open moonroof won't affect gas mileage that much at normal road speeds.
What does mufflers do?
