Ok, you guys understand ... The Sprint Booster only provides a "TWITCHIER" throttle response... No HP increase, just a quicker (milliseconds) response to your foot on the throttle... It takes some getting used to... I couldn't use mine anymore because it prevented smooth feathering of the throttle thru very high speed turns on the track... It was too "HERKY JERKY"...

It's really great for the quick-off-the-line type of driving...