Well just a heads up! I went out today and ordered a complete set of Nitto NT555R Drag Radials for my GTX. Ordered a pair of 325/50/15 for the rear and 275/50/15 for the front. I think its going to ride well with drag radials on all 4 corners. Not the optimal setup, but for tires in 15", I think my best choice. It will take 2-3 days for them to come in and then will swap out the rubber. Will take a few pictures when done.

http://www.nittotire.com/race-tires/nt555r-dot-compliant-competition-drag-radial-tire/