Well since no one here knows.....
Here is what I found out from Brian @ Courtesy Nissan, he has a 98 200SX SE-R.
Quotes from his emails to me:
Paul, unfortunately this run of bars does not clear the emissions related stuff on the 98+ 2.0 motors, I have to test these out on my 98 se-r. so I have all of the fun hearing my car rattle from
time to time.
We do get a bar from time to time that does fit, but it is rare, I know a few people that have modified our bars to fit, look around on the internet and look for a gentleman named Naji Dahi, he actually took it apart and got it to fit around it correctly, he does have a website, and there are pics posted. Stillen does want an arm and a leg for their bar, but it does look good, and that is all that matters to some people.
thanks,
Brian
This is the website Brian suggested:
http://www.geocities.com/n_dahi/