“I assume the story would play out similarly with the N/A intake, C320 intake (supposed to flow 50% more air), single Needswings and dual Needswings. On the NA, would it actually have enough air volume to truly benefit from the dual CAI? I know the gain is HUGE on the SRT guys, but ours?”

First off I highly highly doubt a c320 airbox will come even close to a 50% increase in flow. If someone wants to send that in and cover the flow bench fee’s id be more the happy to flow whatever ya want.
As for the dual being too much for the N/A… the dual is capable of flowing more air then the n/a motor can ingest but just because the dual is not at its full potential we still get a dramatic increase in efficiency. With this increase in efficiency (much less restriction), the n/a’s get an easier working motor which means more power and more mpg at any given rpm level.

“thanx for the info rob!! That helps me a ton because I can’t run the dual CAI in my 32 without cutting up the grille. You guys have much more room in the front than I do. The 55 setup will work just fine with my c3 and is now added to the list! ”

I have personally installed single and dual CAI’s on the slk32’s and did not need to cut or otherwise permanently modify anything for it to fit. It just takes a few extra minutes to make sure everything is set in there correctly.

“I find it real interesting that the Devil Horns have added 16 cfm to the air
flow. After that awful long lecture about how they would add nothing.
Seriously, 16 cfm isn't big, but every little bit helps.”

The air increase is due to the rolling edge of the devil horns as air enters the tube, we were also able to improve upon the devil horns on the flow bench by playing with some clay around the horns back half but that is something we will have to look into to see how feasible it would be to do on future devil horns. Ideally this is by far the best flowing inlet but there isn’t room for it.
http://www.vibrantperformance.com/pressrelease23.php they have one of those there at the shop for demonstration and it will outflow the bench!

“Speaking of every little bit. I wonder how the SL55 setup would flow if
they had K&N filters (or some other higher flow filter) instead of the
stock filters. Just how much would be added by the filter swap? Enough
to compete with the NW single?”

If someone wants to send in the different filter and cover the flow bench time I’d be more than happy, my guess would be a 20-25cfm increase.

“I would like to see a photo of the test set up.
I have particular interest in the set up for the horns.
As the set up may indicate if the test actually proved their worth or not.
Enquiring minds want to know.
I assume the air was sucked through the systems.”

Check the attached image in the first post. Yes air was sucked thru the system the same way as it would on the car. The only difference is that we plug the valve cover breather port on every system we tested.

“Seems the SL55 intake flowed enough air to “more than” hold its own against a Dual NW equipped SRT6.”

Not for long, Paul’s sl55 airbox will be hanging on his garage wall very shortly

“Gotta ask, how are the horns helping without vehicle motion and increased airflow? I can see that they would support increased scooping of air from the cold zone while driving but can't get my head around how they are improving your bench tests?”

Angle of approach for the incoming air, it has nothing to do with vehicle speed; it is how efficiently we can get the air into the tube. Notice in the first flow bench thread how the CAI’s flow better with an air filter on then versus removing the air filter completely and sucking thru a straight cut 3’ piece of aluminum. This is due to the insides of the air filter and how they have a nice round smooth transition.

“Do any of the Needswings airbox's pass California emissions?”

Sorry we are in Michigan and do not have a way to have them tested. If you have any info I’d love to hear it. Now we do properly filter the air and also keep the valve cover breather tube in place so all emissions systems are still in check so it should but we do not have a CARB sticker for them, hence they are sold for “off road use only”.

“Do you also have numbers how the flow changes from STOCK PAPER FILTER to K&N FILTER in the stock or SL55-Intake? Thank you very much! ”

Sorry I do not, k&n failed to financially sponsor the flow bench time for us @ $150/hr