I got one of the biggest K&Ns that I thought would fit, and it was too long. My idea was to eliminate the restriction from the Whipple air tube and stock air box. I overestimated the room I had, and had to cut about 4" off of the filter. I then cleaned it with brake cleaner, and glued the end cap back on with polyurethane. You can see the yellowish mess on the end in the pic. You would think that it is loud when you look at the pic, and you would be right. At cruise, there is only a little hiss. But get into the throttle deep, and somebody sets off the air raid siren. How does it run? Drum roll please... Like crap! Before I logged, I was thinking, "man this is way lean. It freed up so much air flow, that when I retune, I'll double the power." After logging, the culprit turned out to be high IAT. On a 90° day, I was cruising at 117°. That's a good 15° higher than with the stock air box. So I get to kill 2 birds with one stone next: I'll have to build an enclosure that will pick up cool air from somewhere, and it will help quite it down.
Maybe this helps with somebody else's mysterious high IATs? Click on the thumbnail:

 

I would have to think your seeing higher than normal iat because of the hotter air your now sucking from the engine compartment. Probally flows better just getting hot air. Relocate that filter to the factory air box location and build a enclosure of some sort, and you'll see better results.

 

Drop your filter between the fender skirt and front end. Basicly under the old air box air. You may need to do some new duct work but you will cool fresh air up there.

This filter was too long, we had to cut the inner fender, so a short or flatter one would be needed. Or if we would have tilted it forward..
Ricky

 

I have one of those Mac Daddys under the truck. Damn things is 18"s long. It comes with a stud on the end to support it.

 

Mike, I messed around with a few different filter setups. I seen what you found with IAT's. Currently I am running a volant air box with a custom 4" tube between the box and my TB. It made a difference on top end but everywhere else is about the same. As far as IAT's and noise they were pretty much unchanged. I might have some pictures in my photobucket link I forget. I would post some up but I cant access them from where I am.

 

you want nice cool IAT's... Then build your self a Snorkel, of course this looks better on Off-Road looking trucks like mine...

I did loose 0.5lbs of boost due to the plumbing but, thats ok... My IAT's drop 15 degrees and they stay that way, plus it sometimes I still get a little bit of Compressor Surge and it sound wicked reverberating trough the Snorkel (Working on getting some video)...

I built the whole thing from scratch, except the Scoop wich is from a real Austrailian ARB Snorkel...






There is a K&N Style COne filter inside that Canister Air Box, got the idea after seeing a Diesel Trucks engine bay, the whole set IS water tight...

 

I'm running an 18"long K&N filter used a 8"x6" pvc tee for the housing using a 8" plug on one end and a 8"x4" tee leading to my intake tube,I'm piping cold air up from the bumper on the 6"side of the tee.

 

I like the look of your truck . . . . looks like something out of Jurassic Park.

 

hehe thanks!

 

pics!