It's probably not a common swap, so you'd want to check where you plan to connect things back of the cat, and see if the flanges will match up. If I had to guess, I would assume the I-6 exhaust collects into a single cat? Or does it merge post-cat?

If it's truly bolt-on, then you'll need an extra set of hangers and matching fasteners - realoem.com will point you in the right direction, just look at your same year vehicle with the 4.8 powerplant option.

Be sure to put in new bolts and copper washers if it is a true bolt-on process. Those copper washers are one-time use only.

Probably also worth checking TIS for an exhaust replacement, you'll get good pictures of the process and understand if other systems or components may interfere.

Lastly, you may need different underbody paneling - although I doubt this is the case.

__________________
2009 E70 N62 Titansilber Sport
2000 E38 M62 Schwartz II Sport
1997 E36/5 Schwartz II M-Sport (gone)