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.

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2011 M3
2006 Sierra 2500HD 4WD LBZ/Allison
2004 X5 3.0i 6MT
1995 M3 S50B32
1990 325is
1989 M3 S54B32

Hers:
1989 325iX
1996 911 Turbo