those cars are much like ours in that they weren't designed for driving in a straight line. I've got lowering springs, kyb's rear stb, and a 22mm rear sway bar. 17 inch wheels with 225/40 SO3s, and that mazda speed stock still handless a lot more smoothly, sharply and predictably. Not to mention that the turbos peak at 8 psi without a boost controller. I'd take one....