Originally Posted by nick325xit 5spd

Note that the M62 mufflers appear to be identical to the 3.0i mufflers. Even the 4.6is. So those are a cosmetic upgrade for better tips, but no change in sound.

The facelift 4.4i mufflers drop right in.
You can also do the 4.8is mufflers (what I have), but those take a little more effort as the flanges are a different size.