Installed performance chip across MAT sensor on my 4.0L's intake manifold.
My Cherokee has now got much better throttle response, especially down low.
Along with boring out my TB and removing the stock air box restrictor my 4.0L is starting to liven up!
Comments: Bought this from a guy in Canada on ebay:
Along with a 1" TB spacer, boring my TB to 60mm and removing the stock airbox restrictor my 4.0L has really livened up!
Easy install chip just scotch locked across the MAT sensor wires on the intake.
Pro Choice module is a good low cost mod which has given my XJ more response down low!