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    Hypertech Tune -- mystery?

    Thanks. After talking to the Brenpeed folks, I ordered a SCT X-Calibrator 2 custom programer from them (I'll sell the Hypertech on ebay). I had thought that a 93 octane tune on the 2006 GT would produce about the same performance as an 87 tune (true with the Hypertech -- 1 HP difference); they...
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    Hypertech Tune -- mystery?

    2006 GT with auto trans. I have K&N Typhone CAI, Magnaflow X-pipe w/ high-flow cats, and Magnaflow mufflers. My Hypertech III tune (1) gives worse performance than stock with RPMs extended by 500 (beyond 6K redline) and each shift extended by 400; and, (2) with no RPM extensions, gives better...
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    MagnoFlo Exh w/ a X pipe

    JBA headers How are you dealing with the CEL and DTC issues? Are you getting a Dyno tune?
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    MagnoFlo Exh w/ a X pipe

    I have Magnaflows on my 2006 GT. With LT headers and an H pipe, they were too loud, in an undesirable way: at about 1500-2000 RPM (about 60-70 mph) there was a horrendous resonation in the cabin. I removed the LT headers (for other reasons) and also replaced the H with an X-pipe. The car runs...
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    O2 sensor codes, need help

    Most likely it's your long-tube headers. I had JBA LT headers and had to remove them to eliminate getting DTCs and CELs. Removing the DTCs & CELs is not suffifient; you need to eliminate the cause of getting them. Because the before-cat sensors and the after-cat sensors ar not spaced (with...
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    Long Tube or Shorties??

    I had long-tube headers insatlled, but am preparing to remove them and put back the original exhaust manifold (headers?). The reason: I cannot get rid of DTCs and CELs, and am informed that the mfgr, JBA, says it can't be done. The car is registered and driven in NY. Any different experiences...
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