Installed a "Sprint Booster" last Monday, it blew my mind when I took it around the block for the first time. The car is bone stock and had a noticeable hesitation at initial throttle all the time. The result of that little gadget has made the car immensely more fun to drive, throttle response is instant which is a big change from before. It does what it says it will do, no question about it. Keep in mind it's a stock car and NO I'm not under the illusion it made any more power, simple throttle response adjustment. I dig it!