I am currently having kooks long tube headers, catted mids, K&N CAI, 180 therm, and a magnaflow catback installed on my car but the shop doesn't have the ability to do a custom tune on my car b/c they are only set up for ford and GM cars. I ordered and now have my predator but I have never used one before. I am looking for any help/suggestions on how to approach the tune. Is it better to just run what the handheld has installed or try and go in and make some custom adjustments. If anyone has a similiar setup please let me know what you did. I think I have heard you need to do something with the rear 02 sensors but I haven't been able to find that thread. Thanks for your help in advance.