Review on SprintBooster SBDO0013S Performance Upgrade Converter by Jesse Spoja

I bought this primarily to improve my reaction time when racing my Challenger. Although my reaction time improved slightly, my time at 60ft 1/4 mile improved by 0.1 seconds. It feels great on the road and has really improved engine response, especially when accelerating from a standstill or cruising at high speeds. It downshifts a lot quicker and pulls a lot harder than before. Unfortunately, when my wife is in the car, I have to turn it off for her. She doesn't appreciate high-performance cars.