To be honest, unless you are going to the track or just have money to burn, there isn't one out there that is going to make THAT MUCH difference for the time and money involved, or without trashing the stock setup. It's not a car you can mod like a RICER and make huge gains, but you can cruise 140 mph all day long with it stock. You have to look at what you have, what you hope to gain, and what it is going to cost you to get there.