No. You don't get it. At all.
He said if you want to put them in the rear deck, aka, infinitely baffled setup, get these:
DLS OA8 (OA-8) 8" Single 8 ohm Performance OA Car Subwoofer

Otherwise, get Type R's and put them in a box.

Honestly, if you dont get any subs at ALL don't waste your money on 6x9s....