Here's one of the better known devices:

http://www.signaldynamics.com/products/Modules/xp.asp


1995 Trooper LS auto 3.2 DOHC /w SOHC intake
1989 Trooper 2.6 auto
1989 I-Mark RS DOHC 1.6
1991 Stylus XS DOHC 1.8