To reset the computer you just unplug the battery for a 1/2 hour+. This will force the computer to learn your driving habits again (with the new mod), If you don't reset your computer than it slowly learns the mod but it is still remembering your previous driving without the mod. With the interceptor your shifts go a little harder and faster. When your driving the shift takes a second or so and then starts out at low rpm's in the next gear. With the interceptor my shifts are quick and have higher rpm's entering the next gear. Makes it feel quicker, but will see at the track.