You really want to see excitement? Go get a can of Sea Foam, pull off your brake booster vacuum line, or the one near the EGR bend area of the upper intake, shove the hose in the can while running the engine revs up to around 1500 to keep it from dying, turn off engine immediately after empty and wait 3 minutes, start it back up, and keep on the gas to keep the engine running and blow this all through the intake system. you will have a cloud of smoke you can see for a block, but when it is over, OH WHAT A DIFFERENCE I HAVE SEEN. Used this method on lots of different vehicles. Mustangs have a pretty good sized intake from the factory with not a lot of tubes, but on intakes that have tubes, or lots of bends and twists this releases carbon that restricts flow. It also helps clean the heads out very well.