buying new tires for my 18s

[05TorchedGTO]

im going to be buying new tires for the rear of my stock 18s.. what do you think is the best tire for street that gets excellent grip when i take it to the track? what size should i go for too?

[ALester38]

I've got the Dunlop Direzza DZ101's on mine. They have pretty good grip but they don't seem to last. I prefer the Toyo T1R's, little pricey but an overall great tire.