One note of caution and it is related to headers. His chips are designed to reduce fuel since the stock chip at WOT is a little rich. However with headers it needs to be higher so he use to charge more to redo his own calibration back to the original fuel delivery %. So if you have headers or plan on getting them you will want to mention it to him.
Keep in mind that some tuners do not charge extra to recalibrate their own chips off the shelf, and some even allow one recalibration for free if your mods change. Mark is a great tuner
, but their are other choices as well.
http://zr1netregistry.com/forum/showthread.php?t=852
