Gotts mod impossible
98 F150 5.4L E40D/4R100
Joined: Nov 2006
Posts: 28,519
Likes: 7,630
From: MI
Also, you make sure to run the correct schedule 3", scheduled 40 is a little too thick. Have to use the septic pvc. It's a little smaller in total circumference and will fit the factory opening in the engine compartment. With 40 you have to have to widen the opening, that's a PITA. I know, built my own intakes from scratch at one time lol. 3 of them to be exact. One of them I used exhaust piping. Almost 15 years ago for these trucks lol. Still have the pics.
Senior Member
Joined: Apr 2014
Posts: 6,246
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From: Indiana
Originally Posted by white89gt
With that, he is still going to pull through a 2.5 inch hole though. He is better off getting the newer style box.
TX Member
Joined: Mar 2018
Posts: 53
Likes: 8
From: TX
Yea I did mine so that I have a direct 3" flow...non turbulent. To do that , you have to fit the PVC inside the box. I did this before the Gotts mod came into the picture. It's solid and will never fall apart, -
https://www.f150forum.com/f6/engine-...9/#post4628445
https://www.f150forum.com/f6/engine-...9/#post4628445
98 F150 5.4L E40D/4R100
Joined: Nov 2006
Posts: 28,519
Likes: 7,630
From: MI
Yea, 3" thin wall, non-perforated, non lined septic. The stuff is used from building to tank, tank to field and also field header pipe I believe. See, I follow my shiiii as well 
Last edited by Jbrew; Apr 16, 2018 at 06:05 PM.
TX Member
Joined: Mar 2018
Posts: 53
Likes: 8
From: TX
Member
Joined: Mar 2018
Posts: 39
Likes: 2
So i bought 3 inch tubing and pvc pipe, opened the hood and fitted the pvc pipe in the hole kn the firewall, but i noticed the tube coming out of the airbox is like 2.5 inches and the rubber tubing goes wayyyy over it, and they do not make a 2.5 inch tubing, so im at a loss for what to do here
Edit:
I found old pictures from when I did it.
Before (Stock Intake Hose):
After: (Rad Hose)
After (Rad Hose Installed):
Last edited by JustinB; Apr 17, 2018 at 01:22 AM.