Your right, every car is a little different and that's why a Dyno tune is usually the best option but not everyone can get to a GOOD tuning shop.
In that case we pull information from all of the cars we have tuned here to make the best tune possible for your car. For 9 out of 10 customers this method works perfectly.
For that 10th customer next step beyond that (usually used on high strung cars) is to go out and data log with our tune on your car. Once you have done that, send us the data log. We can study that and make changes based on what we see your car doing.
Right now we are selling an X3 with a custom tune for $329.
What do you charge for what i am looking for and how do you get my specs. without my actual car there? Isn't every car different even when similar?