Is it a plug and play if I buy EX tweeters for my DX? Are all the wires already there and I just plug them in?

It is easy to remove the A pillar liner, and check for wiring yourself. I did it 3 yrs ago when trying to track down a dash rattle. (Just pull gently at the top)

paulj

p.s. There isn't any wiring to the A pillars. There is enough wiring to install a standard aftermarket headunit with 4 door speakers.