I had nothing but problems with Walker's cats on my 97. I've had to replace these cats on so many W-bodies during my time in shops it isn't even funny and when I worked at parts stores, these things always came back.
I got this while working at NAPA. my Discount was $126 lol.
http://www.amazon.com/Bosal-079-5130...rt+%23+0795130
Has no u-bend and no crush ribs like the ****ty walker. High flow and never set off codes on all the cars I put it on. Oh it's German if somebody cares lol