Originally Posted by Barnyard
I can only speak for my Volant - It uses the stock intake position as well as a 4" hole in the bottom of the air box (very close to where these guys have bee drilling theirs). Volant offers a ram air attachment that draws from the lower grille area for most trucks up to and including the '08's. I called yesterday and they are working on a more cost-effective solution for the 4th gens but have been delayed by SEMA. They couldn't give me an ETA on availability.
I'm thinking about trying something along these lines with my Volant (at least until there's is released). When/if they release theirs I can make the choice then.
I notice if I remember correctly that the additional lower tube to the grill on the Volant and a couple of other aftermarket air intake systems seem to run about $125 or even a good deal more. Honestly, I'm not a terrible cheapskate, but for some of us who've modded or had to make our own mods when they didn't exist or were ridiculously expensive on our vehicles over the years, some of this aftermarket, ready-to-bolt-on stuff seems obscenely expensive. For the most part in most of these aftermarket intake systems, the cost should be reflected in the airbox and the high-flow filter...which still seems overpriced at the $300-$400 range for many of them. But when you see the price of some of the relatively simple plastic "plumbing" pieces, it verges on ridiculous IMO.
Barnyard, unless you have lots of nice, disposable income, you could probably leave your DIY ram air setup in place once you get it assembled instead of spending the extra money on that Volant attachment, especially since you already have that convenient outlet. And please understand that I'm not dissin' those who want to buy those nice, ready-to-roll bits and pieces. I think the OP's setup here opens the door to some fairly effective DIY setups that will actually yield some decent results for the little money involved. I'm still thinking that an aftermarket muffler and this OEM airbox mod with the high-flow filter will be a very worthwhile investment in time. And after seeing the size of the OEM fender inlet, I'm thinking that even these aftermarket intake boxes/filters might not be getting full effect unless they have that additional inlet/hose to the front of the vehicle. It's easy to see why Volant, and I guess some others, provide that additional inlet hole in the airbox case.