Let's clarify, because your sentence is weird.

First, there are different engines. The N52, a naturally aspirated I6, the N54, a twin turbo I6, and the S65, a naturally aspirated V8. In order, that's 330 (then 328 post 2011 facelift), 335 (post 2011 got the N55 single turbo), and M3 engines.

Secondly, there is the body layout designation. E90 is a 4 door sedan variant of any of these cars, E91 is the wagon, E92 is the 2-door coupe, E93 is a convertible. As far as I know, 328s/330s came in all variants, M3s and 335s didn't have convertible or wagon.

If you ever see "E9X", that just refers to any E90/91/92/93 chassis made from ~2006-2012

From what I've read, if you're grabbing an E46 mk60, you want/need the M3 variant. If you're grabbing the newer mk60e5, any E9X unit will work.

 

Thanks ... I've owned 6 of the "E9X" cars - so I'm well versed. Sorry if my sentence wasn't clear enough. Your explanation does clear it up for me though. Found one off of an E90 M3 that was cheap enough, now on to the rest of the parts.

 

I have a couple of the 817.3 units if you or anybody needs one.