As above,....but i'll reiterate.
Stock tires are fine in this class, but i'd probably make sure the tire widths were at least 185 or so.
AWD - don't need it. In this class, there is barely enough power to really stress the traction to much anyway. Efficiency of operation is the key here, and being smooth and controlled with your driving inputs is just as critical as in any class.
If you're smooth then you won't need race brakes.
An AWD doesn't need a rear wing either, not without a front. Your just killing top speed and robbing power with aero in this class.
For me, a low classed car needs to be efficient. FWD or RWD, no aero(maybe skirts), lightweight, only stock or street upgrades, minimal~moderate grip, maximum hp.