Pontiac GTO 2004-2006 - Tuners

Hey guys, i'm looking for the latest and greatest handheld tuner out there. I'm not ready to do a custom tune on a dyno just yet. I'll probably go to livernois next year after I put a cam in. I have an auto and would like to change shift points, turn off post cat o2 sensors (want kooks headers), and maybe gain a few HP. I'm looking a diablo but maybe there is something better. I just bought my 05 GTO a week ago. Any input would be greatly appreciated.

diablo is supposed to be descent for a hand held.

you can also send out your PCM.

To turn off O2s with Diablo you either need to buy the one with the SLP 455 tune or send it off to them.

Thanks for the info. I think I found out why i'm unhappy with the shift points.....the k&n CAI. From what i'm reading it can cause shifting issues and all sorts of stuff with the MAF being so close to the filter. Looks like i'll be going with a SvedeSpeed OTRCAI asap then a custom tune.

I think I found out why i'm unhappy with the shift points.....the k&n CAI. From what i'm reading it can cause shifting issues and all sorts of stuff with the MAF being so close to the filter. Looks like i'll be going with a SvedeSpeed OTRCAI asap then a custom tune.

Good call on the intake and tune, but I don't think the K&N intake or the MAF have anything to do with the shift points.