3" Downpipe?

jretrodude

Member
Joined
Dec 30, 2002
Will a 3" downpipe give you bad gas mileage? Or will it be the same as if you had the stock downpipe?
 
My 3 inch down pipe didnt but my cars not very good on gas as it is I don't think very Maney performance mods will save you gas though
 
I would think it would help, but not noticeably. A larger down pipe makes the turbo flow easier. But its gonna sound better and you'll probably get in to the throttle a lot more so yes, bye bye gas mileage Haha.
 
I never did a back-to-back comparison but the last time I checked milage I got 34mpg on the interstate so I doubt it hurt it.

ks
 
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