I have the U7146. Here are the engine mods:

BBK CAI
non-catted x-pipe
Professional products 75mm T/B
Professional Products intake plenum

Do I need a custom tune?
I have heard some people say yes and no? Help me out with this.

I am having the same problem. I can't get my original to my pc, as I have switched to a new one xp --> vista. I have to use a serial to usb connector due to no serial port. Please help. I was able to put it to my old laptop, but the tech guy told me a littlw while ago that i called and talked to ...