I had this on my 98.5 and it worked perfectly. It has 10 on the fly adjustable power settings and displays boost, egt and power level on a digital display. It comes with everything you see in the picture power box, digital display, wiring harness and pryo probe. I bought it direct from for $849. Selling it for $550. You can read about it here on tst's website
PowerMax3 Adjustable with Digital Boost and Pryo
PowerMax3 Adjustable with Digital Boost and Pryo