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  1. meterman

    anybody running KR500 mufflers with high flow cats?

    I've got an 07 GT500 and I just bought KR500 mufflers and running them with an off road x-pipe. It's pretty loud without CATS. I love the sound but i'm not sure I want to take the chance of getting pulled over. Is anyone running high flow cats with either an x-pipe or h-pipe? I'm just...
  2. meterman

    New SCT X3 91 and 93 octane tune

    Thanks, acutally after letting the car sit for a few hours everything seems fine. Not sure if it's because I didn't shut the car off after installing the tune. Now the car runs GREAT. the boost kicks in as soon as I punch it, where it had a few second lag.
  3. meterman

    New SCT X3 91 and 93 octane tune

    I am new to programming the computer on cars, although I've worked on computers for 10 years. I just bought a 2007 Shelby GT500 Cobra, which is stock. Since the car is set up for 91 octane and it's not available at many gas stations I bought a SCT X3 from a dealer and he made a custom tune for...