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Headers and Gas Mileage..

This is a discussion on Headers and Gas Mileage.. within the External Engine forums, part of the LSx Technical Help Section category; Just curious how adding headers will affect my gas mileage..My car is an 02 Ws6 w/slp lm1 catback and a ...

  1. #1
    sell out Mustang Killa's Avatar
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    Headers and Gas Mileage..

    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

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    Member jujofields's Avatar
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    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...

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    sell out Mustang Killa's Avatar
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    good stuff

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    Senior Member 01ws6er's Avatar
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    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.

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    Member jujofields's Avatar
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    Quote Originally Posted by 01ws6er View Post
    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!

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    Senior Member 01ws6er's Avatar
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    Quote Originally Posted by jujofields View Post
    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!

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    Senior Member INMY01TA's Avatar
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    I definaetely lost a few mpgs after headers.

  8. #8
    Senior Member ss~zoso~ss's Avatar
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    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

  9. #9
    cutting and welding mark21742's Avatar
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    Quote Originally Posted by Mustang Killa View Post
    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

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    Member SilverSteen25's Avatar
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    Quote Originally Posted by 01ws6er View Post
    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!
    2000 Silver Ws6 - Holly Powershot, MTI clear lid, MBA descreened 85mm maf ends, SLP bellow, SLP 160 T-stat, EGR delete, TB bypass, Elite Engineering PCV oil catch can, Sealed Ram Air, Diablo Predator, UMI SFC's, UMI Torque Arm, Borla adj cat-back

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    Internet Tough Guy Fury_786's Avatar
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    my SS is a bolt-ons car...ive tuned it myself, she gets about 17/city and 28/hwy

  12. #12
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    There was no noticeable change in mileage when I swapped in my long tubes.

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