The Performance catalog shows the amp in the area of the glove box. They also mention something about a "coding part", (what ever that is?). They say you need to order one of them also.
Why don't you call Phil at Fast Lane (click on the tab at the top of this page) and ask him for the part number of the amp,then you'll know it's the right part when you see it. Phil can probably get you what you need at as good a price as any one. (Support the site)
Ernie