Akrapovic builds X-pipes with 200 Cell cats...... Call IND and they can get one for you.
I don't personally find there is much of a smell from my Akra Evo with 100 Cell cats. Also, you realize that the 200 cell cats are not going to do much for the soot, only the smell.
2011 E90 M3 ZCP - Individual Moonstone/Individual Amarone Extended/Individual Piano Black With Inlay:LINK!!!
1994 Euro E36 M3 Sedan - Daytona Violet/Mulberry:LINK!!!