I really don't understand why so many people get these generic maps like the revo on their cars, especially when there's so much talk about this tip being better than that tip, and this filter being better than that filter and so on. All these little things mess with your AFR and it adds up... On motorbikes (where I learnt most of what I know about this stuff) you get your bike, mod it, buy a fuel management system which will come with a few generic maps and you choose the one which will sort of match your mods, and then when you can afford it you pay to go and get a custom map done on a dyno so the map is spot on. There are a lot of factors involved in making a decent accurate map and it can't be done over the phone. I'm sure you can get some pretty decent results from revo but it will never be as good as a map made by a decent tuner on a rolling road so he can fine tune everything and get it bang on. If I'm wrong and revo do customs then I apologize but got the impression they're over the counter maps