I run a 96 mustang in the FAST autocross series in th eproduction/race tire class. The suspension ha sto remain stock but i can run any tire that fits under the fender without any modifications, I currently run Kumho VR710 245 45X17 on GT wheels, but it's time for some more sneakers, do you have any recomendations/prices? The rule book states that anything under 140 treadwear is considered a "race tire" cost is an issue as always. thanks