I believe you're making a confusion, ARK pipes are different by Motordyne ART pipes, see photos below:
vs
ARK are not available for DE, only for HR and 370z.
If you're referring to the ART pipes from Motordyne, they're made for the TDX exhaust, they sound amazing paired, I'll try to find some videos on youtube.
In terms of headers, personally I would recommend to keep your money, won't be massive gain over the stock and a painful / expensive job to do unless you're doing it yourself.
However, if you choose to ignore my advice and want to replace those anyway, DC ceramic or Stillen headers.