I had my Ford GT up at a track day at Watkins Glen last year and was on track with some Porsche 996 GT3 Cup race cars. They are gutted purpose built race cars, not street legal, slicks, full cage, very little if any muffler. Driven by guys that race in PCA.
My car had Hoosier RS6 DOT Slicks, Performance Friction pads, Castrol SRF, Trans cooler, Borla exhaust & no Whipple at the time.
Bottom line, the Ford GT reeled them in and ate them up. Also picked off a Carrera GT and Panoz GT race car, all driven by guys with racing experience. Couldn't catch the Craftsman truck though...
It was funny, it was my first session with this group Trackmasters so they put a "Rookie" stripe on my car. The instructors were heard to say "Whats up with the rookie in a street car passing race cars?"