The first thing any 2003-2004 Mustang Cobra Owner wants to do is Turn up the boost! The problem with that is the gauge only reads 10lbs of boost. You have 2 options. Option #1 You can install an after-market gauge and pod in your car, but for those who want the car to retain the stock interior appearance there is option #2. This clear vinyl overlay installs over your factory boost gauge for readings up to 23psi. Simple Easy install that on average takes 1-2 hours to complete. Detailed Illustrated Instructions included & cover the need calibration for proper readings.