Okay, once and for all...
Coil tapping is not coil splitting. Coil splitting is activating only one coil of a humbucker to get a clean sound, coil tapping is switching a section of wiring on and off so that one pickup can have a 'quieter' and a 'hotter' mode with different turn counts in the same pickup. Coil tapping is all sorts of useful but nobody uses it, and it is most certainly *NOT* coil splitting. Just had to get that out of the way...
That aside, any four-conductor humbucker (which is pretty much everything DiMarzio makes, and almost everything Seymour Duncan makes with the exception of attempts at having 'true' vintage one-conductor-and-braided-shield wiring, which I know you're not going to be interested in) is capable of coil-splitting. The way it works is that in a single coil you have a ground and two leads, one coming from each end of that coil. A humbucker will either have a ground and one lead, where one coil's lead has already been grounded and the humbucker has already been wired in series, a ground and two leads, where you have to ground one lead yourself and the humbucker is still wired series by default, or a ground and four leads, where you can use a switch (or reach into the guitar and tie things by hand, as I do when I'm lazy) to turn on each coil on its own, and to wire them both in series (where one coil's negative goes to ground, its positive goes to the other coil's negative, and the other coil's positive goes to the knobs/switches - the usual wiring) or parallel (where both coils negatives go to ground together and their positives are wired together and to the volume pot/switch/whatever - the other hum-cancelling option) as needed.
Metaltastic, you can wire one pickup in parallel. You can put a switch up for that sort of thing, you can leave one pickup parallel, you can even switch both pickups with one DPDT switch (like a toggle switch or push-pull pot)... you don't need to have both humbuckers wired the same way, they aren't dependent on each other at all.
Jeff