Yes - all 97-01 exhaust fitment is same - T509, 955 S3 & T595 & 955 Daytona - only the headers are different, but not at the transition connection to the mid-pipe.
However 02+ 955i's - whether Daytona or S3 (which are different to each other also) will NOT fit.
One that tucks right up by the bodywork is the Blueflame - that is what I have coming for my Daytona motor.
Wolf/Trident are popular but their 'high' level is more a mid-level.
Check out pics to see how these work for you.
I had 2 brothers before (per the pic below in my sig) which I would consider a "mid" level - 2BR is no longer providing a high-level (or that that they previously called a "high" level) for the 97-01 - too bad because their 02+ is high & tight!
[ This message was edited by: DEcosse on 2007-04-05 18:34 ]