2.5 turn is the lowest I've seen. It has an 11900KV rating.

What do you plan to do with it?

If you want to do speed runs you are better off with a beefier (1/8 scale) lower kv rating motor (maybe 2200)that can handle something like 10 or even 12s lipo and then put an aircraft ESC in it that can also run at high voltage. I've seen video of a 10th scale car doing 157mph with a setup like this.

2.5 turn is practically a short circuit. It will probably fry your ESC rather quickly or melt itself from the heat. I think most mod racers don't tend to run any lower than 4 turn. Most I've seen run 5 or 5.5 turn motors. Please correct me if I'm wrong rctech community. There are a lot of people here way more knowledgeable than I am.