I havent seen those or talked to anyone putting them on a SN197 Mustang. I recently replaced the Goodyear Eagle Supercar tires on my 2009 GT500 with Nitto 555's. Better grip and I am told they last twice as long as the Goodyears for about $30 per tire more.
2009 Shelby GT500
#1289 of a build of 3004 coupes.
#51 of 156 coupes manufactured in Alloy Metallic.
Pype Bombs exhaust and Nitto 555 tires