The bladders would be the kind of square looking objects off the main tube? That would make sense to delete those. Don't know how much skill I have, but definitely something I could do.

 

Here's link specifically for the 2004-2008:

http://www.f150online.com/forums/exh...4l-engine.html

and one more:

http://forum.gopowerhungry.com/2004-...-pictures.html

 

Fiberglass.

 

before i did the gotts mod, i removed the last part of he tube that goes into the fender and put a old k&n cone filter on the end and cut a big hole in the paper panel filter. just kind of an experiemnt i wanted to try. now using my edge i set it to show the intake air temp. with the cone filter on and sucking in the engine air it was at around 65-70 degrees, the outside temp was only 35/36. so that a pretty big diffrence. i havent even thought about checking the temp after i did the gotts tube but i knew it would be cooler then the k&n cone filter on their so i switched that in a hurry. although it did sound awesome.