“Best of the Best” 2011 Scion tC Tuner Challenge Recap @ 2010 SEMA Show. The sixth annual Tuner Challenge brought out the Best of the Best previous Tuner Challenge winners and runner-ups to compete in the 2010 SEMA Show. John Pangilinan, Shawn Baker, and James Lin give us some insight into each of their builds and some of the custom modifications done to their all-new 2011 tCs.