Supposedly it isn't actually a fuse as was a rumor for a long time, but just a simple alteration (I'm guessing computer related) that your dealer can do for you to get it to open up at 1400rpm's. There is also another even quicker procedure that performance shops can do supposedly so it opens up on ignition. I will let you know in a few weeks when i try it to see if it works as well as I have been told it does. But for now, defintiely ask your dealer - it should be a simple procedure and they shouldn't charge you for it.