Jason,
Like it was mentioned already: Check the rules with what race you plan to compete in, and get a 16T driver.
If you run WKA, you need dual-brake system. Which means two separate brake systems, either two rear or one front/one back
If you run CES, you won’t need to worry about the extra brakes.
I suggest Grattan and Gingerman. Both require you to drive well.
David Cole - EKN Managing Editor