Stock Air Box

AMS3 · Dec 7, 2020

So I went to the auto store to get a new battery, and was talking to the tech about my K&N "Cold Air" intake. It was already on the truck when I bought it, and didn't think much about it. He told me that it's actually a "Hot Air" intake, since it's sucking in the eng comp heat. Makes sense. He told me the factory is better. My question is, is it better, and does it actually have a tube that connects to the fender well cutout, which would allow it to draw ambient air in from the front of the truck? Any advise is welcomed.

rottenronnie · Dec 7, 2020

It was the first mod on my truck.
It dropped around 8 horsepower and sounded strange (like it had valve float around 5800 rpm), so off it came.
My advice- Go with a K&N Drop-In filter.

rottenronnie · Dec 7, 2020

Yes, the factory box draws outside air from the passenger side grille and into the airbox.

AMS3 · Dec 8, 2020

rottenronnie said:
Yes, the factory box draws outside air from the passenger side grille and into the airbox.

Thanks Ronnie, now to find the complete system...

AMS3 · Dec 9, 2020

AMS3 said:
Thanks Ronnie, now to find the complete system...

Anybody on here have the complete setup with brackets they might want to sell???? Having trouble finding one on the internet.

oldcolt · Dec 9, 2020

Ronnie and I had my truck on the dyno several years ago. I did a test with the K&N diesel cone drop in filter and the K&N flat drop in filter. The diesel cone filter produced 1HP more than the flat.

AMS3, if you find a stock set up, make sure the gasket on the filter box inlet from the fender is good, or you will suck in hot under hood air.

AMS3 · Dec 9, 2020

oldcolt said:
Ronnie and I had my truck on the dyno several years ago. I did a test with the K&N diesel cone drop in filter and the K&N flat drop in filter. The diesel cone filter produced 1HP more than the flat.

AMS3, if you find a stock set up, make sure the gasket on the filter box inlet from the fender is good, or you will suck in hot under hood air.

Thanks for the heads up. I still haven't found one...

AMS3 · Dec 10, 2020

oldcolt said:
Ronnie and I had my truck on the dyno several years ago. I did a test with the K&N diesel cone drop in filter and the K&N flat drop in filter. The diesel cone filter produced 1HP more than the flat.

AMS3, if you find a stock set up, make sure the gasket on the filter box inlet from the fender is good, or you will suck in hot under hood air.

So X2 Builders has one that's complete with brackets. How would you mount a cone filter on it?

rottenronnie · Dec 12, 2020

The cone filter drops into the stock air box, just like the rectangular filter.

rottenronnie · Dec 12, 2020

It has a rectangular outside with a cone inside and a rich creamy center.

oldcolt · Dec 13, 2020

The K&N drop in cone filter was actually made for the Cummins Diesel, but it works for our application. If you do a search here on the forum, the part number should pop up.

rottenronnie · Dec 13, 2020

Yeah but if you use one, do you have to change from gasoline to diesel?

oldcolt · Dec 13, 2020

rottenronnie said:
Yeah but if you use one, do you have to change from gasoline to diesel?

Yes! It is highly recommended by experts! lol

rottenronnie · Dec 13, 2020

Great!!
It's a bit cheaper than 94 Octane.

AMS3 · Dec 14, 2020

oldcolt said:
The K&N drop in cone filter was actually made for the Cummins Diesel, but it works for our application. If you do a search here on the forum, the part number should pop up.

I found this P/N in one of the forums from 2012, and searched it. Does this look like it?

oldcolt · Dec 14, 2020

AMS3 said:
I found this P/N in one of the forums from 2012, and searched it. Does this look like it? View attachment 64237

Yes that is the one.

AMS3 · Dec 14, 2020

oldcolt said:
Yes that is the one.

Cool beans. What needs to be trimmed on the box?

rottenronnie · Dec 14, 2020

Nothing, you can just throw the box the cone filter came in away.

AMS3 · Dec 15, 2020

rottenronnie said:
Nothing, you can just throw the box the cone filter came in away.

LOL! Well I got my air box and tube from X2 Builders yesterday, and now see what needs to be trimmed.

oldcolt · Dec 15, 2020

AMS3 said:
LOL! Well I got my air box and tube from X2 Builders yesterday, and now see what needs to be trimmed.

I did mine in 2008...memory is a little foggy, but if I remember it’s the inlet for the tube from the valve cover vent. I know there is something in the way on the inside of the box!

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