It shuts it off electronically. I believe B&G does the same thing. You can also put the car in autostick, get a non-mds lifters, or non-mds cam. There is plenty of ways to get rid of it.How does the Predator shut off the MDS and know one else can figure out how to get around this. I wish someone would figure this out like the key trick that turns off the bass / abs system.