Quote:
Originally Posted by Daox
A properly designed header will improve mileage. Pretty much all aftermarket mufflers are designed to shift your powerband to higher rpms. This of course is the opposite of what we want. So, short of making your own custom header, I'd say it won't help.
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I'll just chime in to confirm this. If you want a header to increase FE you need to do custom design keeping in mind troublesome things like resonance blah blah. Seems more effort than it is worth.