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    help!!!very bad fuel mileage

    hey all my car is getting 13.5 mpg i drive the car in the city shifting under 2600rpm i have a k&n full exh w/o cats the car has always done atleast 15.9 in the city and the past couple of weeks its been dropping to were its at now i was looking at my o2s and i see bank 2 switching from .1 to .9...
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    bought steeda springs on ebay need help!!!

    alittle help here:bang: i bought a set of steeda springs for my 08 gt the seller said they were ultralite springs when i recieve them they look great but i see they say super lite on them and have a progressive rate coiling to them does any one know if these are really ultralites? on the steeda...
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    any one use spohn suspension products?

    hey all. any one have any experience with spohn performance suspension product looked at their site and really like the whole del-sphere set ups they have. thanks in advance.:hail2:
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    new 08 gt help with mods

    i just bought an 08 black 5spd gt and i already installed the k&n intake and magnaflow magna pack cat back system,and i also have the magna flow off road x pipe on order .i have two questions will the off road x set off an mil, and two will i see a big difference with a tune. any in put would be...