Well, it is pretty easy, although some have a problem getting a washer out of the hold down on the throttle peddle. This device goes "inline" between the throttle pedal, and throttle sensor. It means you have to take the throttle pedal lose, and plug it in line, re-attach throttle pedal. Do a throttle reset until the lag goes away. There were 3 models available. 1 for regular aspirated XF stick, another for auto, and another which is selectable. Normal driving, aggressive driving...they work on the SRT. So, if you can fit yourself down under the steering wheel, you shouldn't have a problem...I can't do that as well as I did a few yrs ago...