I know they are popular with the mustang crowd. In fact when I had my mustang I was going to have them tune it. When I was at Fontana a little over a year ago, Adam, the owner/tuner of ST motorsports was testing a K/B s/c 2011 Mustang GT for K/B. They also bought a 2011 Camaro with a K/B but they didn't run that one.
Stock manifold, cats, X pipe, comp 222/222 cam
Tuned by CMS.