i see all these ecu's for 95 and 96...even some for 97-98 but whats so different with the 99's that the ecu's cant fit??? i know its probably already been mentioned but i just got off work and call me lazy but i'm tired and bout to hit the sack...

 

It's supposedly something to do with the security on the 99s. Go to Jimwolftechnology.com they're the only place that makes on that mostly works for the 99s. I have one that I bought used from an org member and it has alot of CEL codes but the power gain and powerband gain is worth it. They're pricey from JWT though, probably looking at about $750 or so.

 

The wiring is slightly different for 99's, hence why the ECU's aren't plug and play.

Skip the hassle of JWT and go with the Greddy Emanage Ultimate. Granted, you'll have to have a laptop if you plan to tune it yourself.......

SEARCH!!!!

 

The immobilizer system and some wiring resembling 5th gens are the 99s main ECU differences. Like The Wizard said, Greddy Emanage Ultimate is prob better and less of a hassle than JWT. They both run about the same price.