I am just curious how difficult is it to custom mod an exhaust designed for Quattro cars to put on FWD cars?

for example, some manufacturers don't make exhaust for FWD cars (such as AWE, Creative, etc), but if I wanna put them on FWD 2.0T, what do I need to do?

Thanks for any input.

Merry Christmas!

<a href="http://www.stasisengineering.com/Category_Detail.aspx?id=26&VID=200&PID=181">Stasis FWD Cat-Back Exhaust</a>