Boidster Posted April 9, 2014 Report Share Posted April 9, 2014 If any of you have put a pump gas tune into your stock GT500, I'm interested to know what benefits you saw. I've got the resonator delete kit and an Airaid filter, but that's it. No pulley, no TB, nothing cool like that (yet!). Picked up a relatively cheap used X3 tuner, and I'm considering putting a 91 octane tune into the car, if I'd get something out of it. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
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