Yes, the suspension is way better than stock, anything is better than stock. Your worst choice is the Kumho tires. It's like running a marathon in Payless Shoes.Get some Yokohama Advan - Neova Sport. These tires are stock on the Lotus for a reason. BTW, the 2 1/2" lowering will make your car useless on regular roads, only for competition track driving. Believe me, I have done a 2 1/2 " drop it's horrible for everyday driving. Had to replace stock bumper cause it scraped so much.