If you don't know much about cars like me this is the place to come. Rich gave great feedback and information about what is wrong and what is the best way to go about it. I brought in my BMW 435xi to take my tune off, they pretty much told me that the tune was messing up my car and they were right. I drove my car after taking the tune off and it drove so much better. And whenever I have questions regarding other upgrades and how to go about them they always give me honest answers if I should do it or not, and if so how to do it the right way so no problems will occur which is great. So from now on I will only be coming here in the future for any car related problems or upgrades.