*updated* i looked up picks..
uhm.. pretty much all the sedans have the same boring front bumper for all years... then 02+ got the light facelift... but bumper i think is still pretty much the same...
the coupes are the ones that are different..
the new coupes with sports package have the front bumper that kinda looks like ^==^ on the bottom part..
the previous coupes sports package had like this mesh grill with i think 2 titanium inserts horizontal (or maybe that's the rear).. . kinda looked like 0===0... by far my favorite sports package front.. the rear looks similar.. i think that was actually m-tek 1... but here's what it looks like.. and i think there's a bunch of different variations of this bumper... but the only difference is the way in which the middle part is styled..
http://photos.e46fanatics.com/showphoto.php?photo=13063&papass=&sort=1&thecat=502
and of course there's the mtek-2 style.. which is the one that looks similar to the m3/m5 bumper but the dtm h-style spoiler.. as opposed to straight across...