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  1. DeathWish

    What programmer to get for 4.6 2003 GT with some mods

    Hi, I have a 2003 GT, with the MAC Straight Shot (95mm), SLP XPipe, SLP LOudmouth Catback, plus some other minor modification. I am looking to purchase a programmer to take me to the next level, and also get rid of my RUNNING LEAN ERROR because of the intake. I am looking at the DiabloSport...
  2. DeathWish

    MAC MASS AIR SYSTEM Problems....trips Service Engine Light

    I have the MAC straight shot. Everything was running fine for a few months, but recently my Service Engine Light keeps coming up. If I disconnect my battery, everything seems fine, but after some driving ( a few days usually) the light comes back again. The codes say that my car is running LEAN...
  3. DeathWish

    P0171 System Too Lean - Bank No. 1. ERROR

    My service Engine Light comes up... Here are the 2 error codes: P0171 System Too Lean - Bank No. 1. P0174 System Too Lean - Bank No. 2. I have a MAC Straight Shot Mass Air Intake, SLP Xpipe SLP Catback Any suggestions? Do I need to program my car?
  4. DeathWish

    Service Engine Light

    Seems to always go off when I fill up the gas tank but not all the way... coincidence or no? Anyone else have these issues? This is a 2003 GT modified with SLP Headers, XPIPE, Catback, pluc MAC Mass Air.
  5. DeathWish

    What kind of Lightbulbs are in the front lights?

    I see at the store there is H1, H2, H3 etc for Halogen bright lights... which ones fit into a GT? (2003)
  6. DeathWish

    how much horse power gains for these mods

    I am thinking about adding some mods, and would like to know the ranges for HP gains... 1) Mac Cold Air Intake 2) 10mm throttle body upgrade 3) SLP Loudmouth Exhaust 4) SLP X-PIPE with high-flow cat thanks.
  7. DeathWish

    SLP Exhaust question, Xpipe or H pipe

    I am getting a SLP Loudmouth Catback for my 2003 GT. But I have a few questions. FIrst, what kind of performance should I expect? Then all this talk about H Pipe versus an X pipe... should I get an X Pipe and what kind of performance (and sound) performance should I expect? Third, drawbacks of...
  8. DeathWish

    Any Local Chicago Suburbs guys with SLP Exhaust?

    I would love to hear it live... I want some. So let me know, I would love to compare it to my stock GT.
  9. DeathWish

    03 GT newbie... Need lists of local stores in Chicago/Naperville

    HI... I bought my 03 a few months ago, and now it's time for some mods... Are there any local stores in the southwest suburbs of Chicago so I can see some of these products? Naperville, Bolingbrook, Joliet, Aurora, Orland Park area? While we are at, what are some must haves as far as mods...
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