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well, I did the gmpp cai, dejon intercooler with aluminum piping and magnafow catback all at the same time within hours of the tune. they say you won't notice the gmpp upgrade right away because the car has to learn a little. However, with all I did, the car def. woke up. I think the gm tune was well worth it especially to keep it under warranty. when I traded it in, I took off all the bolt ons, but obviously the gmpp tune stayed. whoever got the car now probably didn't know it was done but the underhood sticker is there plus it'll come up in service records.
if gmpp happens to come out with a upgrade for the 1.4L turbo ecotec, ill most likely get it for my cruze, lol.
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