The other day here when I was cleaning up my K&N drop I was trying to find ways of improving the stock system. I didn't like the modification under the "technical articles" as I drive in dusty conditions alot of the time and on many vehicles it will lose performance. As I tore the stock box out of the fender wall I noticed that the snorkel gets considerably smaller the deeper it goes into the fender, all the way down to 2" in diameter. I also didn't want to spend $200-$300 on an intake.
I started doing some rough measurements of the stock system and the end of the stock box where it connects to the snorkel was 3.5" in diameter and the hole into the fender was approxiametely 3.25" in diameter but kind of ovally.
So off to Home Depot I went and I picked up a chunk of 3" PVC pipe and a 3" rubber cuplor. When I got back home and started tearing it apart I realized that for the PVC pipe it was 3" in Diameter on the inside and 3.5" on the outside. No big deal, get out the angle grinder and grind down the end until it fit, I then crammed the hole setup up 1.5" into the fender.
The end result is a true full 3" COLD AIR intake, (none of that ram air $h!t) for about $16. Also it is 100% reversible, not one stock piece was modified so you could take it back to stock without replacing a thing
This would be the stock box with the modified snorkel in place.
The diameter of the PVC pipe, 3"...... (socks with sandels, what a loser........)
The diameter of the stock snorkel, barely making it to 2"
And what it looks like installed on the truck
Let me know what you guys think
Edit: Its a 2000 5.4L