Hey BW, I'm confused about what car you have? M52 engine or m50? Has to be m52 since you're getting a m50 manifold right? Anyways, my chip cost me 250 custom made by the Josh at autowerks.com. He's a standup guy and asked lots of questions to get it right. Now I have no idea how these cams are going to work or what kind of SW you'll need on your car to acomodate the cams since you more then likely, to my knowledge, have a m52 engine setup with obd2. If you were to do a full obd conversion, I could tell you anything you wanted to know and what to get.