If you need custom tuning or might need custom tuning down the road either the intune-dcx or the trinity t1000 from diablo sport is the best choice. If you do not need custom tuning or need any fancy gauges to look at while driving I would get the SuperChips 3842 (if you live in California the part number is 3841). If you do need or want the gauges then I would get the Bully Dog 40430.
If you need pricing on any of these items shoot us an email to firstname.lastname@example.org
we have the lowest prices around on all of them, just remember to put in the email you are a member of the Z and you will get our best discounts.