yes, but i think most racers, if not quite a few run the GTBs. I dont race, but my friends race sportsman mod, and they run the GTB. So you might wanna consider getting a GTB.
im not sure about this, but this is what i think, and what my friend runs so yea. but i do know the 5800s are pretty fast. i have one in my bk2, and its great. im sure if you have the right setup, and gear it properly for ur track, you can run the 5800 in mod easy.