Yes this is for autocross. I am exploring the options for R-comps for my 2011GT, especially after the way it handled at its first autocross on street tires yesterday. I am looking to see if you can fit the Brembo's behind 18" rims first, and then, if not, what is the largest tire that I can fit on the 19's without rubbing. These 255 Pirellis are way too small for this car under competitive driving circumstances. I will be hitting a few national tour events this year, so I need to get this tire situation under control now.
2011 Mustang GT 5.0
Sterling Metallic Grey, Brembo Brake Package, 6 Speed MT82, 3.73:1 Diff