As Flava said, the DEK has a VI already, commonly referred to as a "00VI" because of the year they added it. Search the forums and you'll see comparisons. The 00VI adds 1 or 2 extra horsepower over the MEVI, but it's a lot harder to add to the DE block and it doesn't look as nice
I haven't installed mine yet cause I'm gonna do an oil change right after and I just did it a few weeks before I got it. But, it did take a while to come in, so it should be there soon! Enjoy!