Originally Posted by 1bmw1
Since you're removing the oil pan, you might want to change the oil level sensor which is quite common to go on the E46's. Just a thought.
Let us know how the headers are! I installed some aftermarket headers on my previous E46 and it was quite the pita, but it was well worth the effort. Are you adding some cats or leaving it catless?
Im thinking of going to cat less right now... still have a week to do research.
Will post back when they are installed