I recently purchased a different civic with a d16z6 swap already done, thing is, it's a 96 dx with no stock vtec wiring.

So here is the question…
I plan to improve the performance like all of us i/h/e, injectors, etc...

What would be smarter to get, an aftermarket vtec controller or a plug in wire harness from rywire? Will the aftermarket work without the other?

please dont flame me, im new and in the dark on this one
thanks