I have a buddy who had one with jb3 but and earlier version i beleive( he said he needed an update) they are quick cars and would be evenly matched with our cars mod for mod. My old stock turbo srt-4 would wreck it easily. I raced on at the track with my srt-6 and have it on vid. Easy kill even with my horrible times. But i know the driver needed some seat time. Stock they are low 13 sec cars at about the same mph as our srt crossfires. They do however have more aftermarket support so im sure there are many 11 sec stock turbos 135i's