Hey guys, I have a 2012 Mazda 3 Sedan (4 door) with a 2.5L engine. It is auto tranny . What mods would you suggest? I really would like to address handling in the most economical way possible.

Rear sway bars? Struts? I would like to stay away from anything that is over 250$.

Also, how is the increase in performance from a Cold air intake in this car?

Thanks in advance. cheers