I just got the ARH, I'm thrilled!
I got the QTP cutouts with the digital controller too, with the stock mufflers.
I'll shout for the ARH, I'm sure both (ARH / Kooks) are equally priceless. This should be the first mod for all. You wouldn't believe how good this car sounds at idle with open headers. No need for the horn either, push the clutch in and rap it, you will have everyone's attention, if you didn't already. I see people running through yards and parking lots to see...WTF was that?!