header/intake question

Joined
6 October 2002
Messages
339
Location
san jose, ca
I'm still a newbie when it comes to modifications.

will headers increase/decrease gas efficiency (mpg)? I would think since there is less resistance for the engine, it would improve it.

will having an intake affect mpg in any way? this one i'm not so sure about. i guess more air can be provide for combustion than stock but does that end up with higher mpg or lower?
 
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