I am not pointing fingers at anyone. It just seems that since the production of the RX-8, which also carries the title of 13B, and the rotors fit the housings of a second gen RX-7, some ITS cars are significantly faster all of a sudden from one event to another. 5 seconds is serious extra horsepower. I also race in Grand-Am cup competitively and am a qualified driver. Because the RX-8 engine is a 13B and a second gen is a 13B, I am questioning the legality of this. Some of the speed may come from their ECU but certainly not 5 seconds. thanks