I may be interested as the Riss pipe I ordered has not shipped for two weeks now.
Did you run it with the HF cats on? Did you get a check engine light?
I will PM you as well.
Tim (apparently likes "3" cars)
E90 M3 -- Current ride
2004 GT3 -- Sold
1997 M3/4 -- Sold
1995 M3 -- Sold