HX40
 

I found a great priced hx40. what must be done to get the sucker on my 1st gen?

As long as its the good t3 one then, a modified downpipe, a 4" intake, and a way to hook it up to your crossover pipe. Go here and you can find what you need to make it work. Dynaflex Chrome Muffler Stacks | Chrome Stacks | Rubber Intake Elbows | Donaldson Mufflers