Headers and Gas Mileage..

**Mustang Killa** · 05-10-2008, 05:43 PM

Just curious how adding headers will affect my gas mileage..My car is an 02 Ws6 w/slp lm1 catback and a lid for now.. adding some longtubes is my next objective and would like some input thanks

**jujofields** · 05-10-2008, 05:53 PM

Adding headers should increase your gas mileage, since they more effectively remove the exhaust gases from your engine. Hence, your engine doesn't have to work as hard to expel the exhaust from your car, which is why you get an increase in hp from adding headers...less restriction=more hp/tq & improved gas mileage...

**Mustang Killa** · 05-10-2008, 06:00 PM

good stuff

**01ws6er** · 05-10-2008, 06:01 PM

I'm gettin shitty mpg, but I'm also getting on it a little more and I'm untuned, but I would have to say it depends on how often you stand on it.

**jujofields** · 05-10-2008, 06:08 PM

Originally Posted by 01ws6er

I'm gettin shitty mpg, but I'm also getting on it a little more and I'm untuned, but I would have to say it depends on how often you stand on it.

Oh definitely...it's easier to get worse mpg when you've added more power to the car & tend to step on it all the time!

**01ws6er** · 05-10-2008, 06:22 PM

Originally Posted by jujofields

Oh definitely...it's easier to get worse mpg when you've added more power to the car & tend to step on it all the time!

Oh yea haha. The sound and power are so new that I want to hear it all the time!!! Paying for gas is getting old haha!

**INMY01TA** · 05-11-2008, 08:57 AM

I definaetely lost a few mpgs after headers.

**ss~zoso~ss** · 05-11-2008, 09:14 AM

i gained a good MPG boost after headers and ORY, but now i'm finding out that headers are making my car run lean which isnt the best thing

**mark21742** · 05-11-2008, 06:43 PM

Originally Posted by Mustang Killa

Just curious how adding headers will affect my gas mileage..My car is an 02 Ws6 w/slp lm1 catback and a lid for now.. adding some longtubes is my next objective and would like some input thanks

stock 04 a4 gto got 16 miles per gallon. now with pacesetter Lt's, 3" true duals, p&p tb,slp maf, cai, tune, some weight reduction, and a few other things I can't think of at the moment I've got a lot more power and averaging 22.5 miles per gallon... til I get on it

**SilverSteen25** · 05-11-2008, 10:13 PM

Originally Posted by 01ws6er

I'm gettin shitty mpg, but I'm also getting on it a little more and I'm untuned, but I would have to say it depends on how often you stand on it.

Get that beast dyno tuned buddy, u won't regret it....It will make a big difference in ur performance and it should get u better gas mpg....My buddy has an SS that he bought last fall with headers, the previous owner never got it dyno tuned, he took me for a drive in it and I wasn't very impressed.....He got it dyno tuned this spring, world of a difference, it runs like a raped date now!