headers & exhaust system

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Apr 22, 2016 | 01:12 PM

#16

Codyaye

Thread Starter

Senior User

Joined: Oct 2015

Posts: 441

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From: CDA, ID.

Quote:

Originally Posted by 16F350

I have been accused of alot of things, but never of knowing what I am talking about. J K.

The converter wizkid recommended are nice and the price is reasonable with the free shipping Summit offers. Just keep in mind if you do dual converters you will have to weld in O2 bungs up and down stream of each for a total of 4, OR see if the same style of converter is available with the bungs already welded in. Will be a bit more, but save time and cost in the long run.
If you have a local shop bend up a system for you request 14 gauge aluminized cold rolled steel or 16 ga. stainless if you have deep pockets. Most shops use light gauge hot rolled because it is easier to bend and work with, also cheaper. You can tell lighter ga. pipes if the bends have "wrinkles" in the inside diameter. The shop or manufacture uses" wrinkle dies" so the thinner wall pipe doesnt kink on the inner radius of the bend.
Keep us posted on your progress

That's a lot of good advice thank you! And I don't know if I'll need a shop to make the bends, as I believe my shop class at my school has the tools to do it I'll be sure to use 14ga or 16ga and keep you guys updated on my progress thank you!!

Apr 22, 2016 | 01:15 PM

#17

Codyaye

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Senior User

Joined: Oct 2015

Posts: 441

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From: CDA, ID.

Quote:

Originally Posted by wizkid00104

That's some good advice right there.

One nice thing about 99-04 is they only have 2 sensors before the catalytic converter.... one in each leg of the y-pipe.

If you get cats with the bungs already on them, you'll need plugs for the rear. And you'll also need O2 sensor extension harnesses. If you just have them install the bungs in the new down pipes, no extension cable should be needed.

This is a nice write up if you haven't seen it yet.
2004 F250 Broken Exhuast Manifold Stud

I don't plan on using cats so I wont need to do that, maybe I will but right now it's looking like a no. And that's a great write up I read it the other day while searching for headers for my truck

Apr 22, 2016 | 02:09 PM

#18

AAubinoe

Tuned

Joined: Jul 2014

Posts: 427

Likes: 4

Here is my write up on installing Gibson stainless ceramic manifolds. Might help.
https://www.ford-trucks.com/forums/1...ticipated.html

Apr 22, 2016 | 03:15 PM

#19

16F350

Freshman User

Joined: Feb 2016

Posts: 26

Likes: 0

Quote:

Originally Posted by Codyaye

That's what my plans are as it is I live in north Idaho I mean people roll coal on to cops cars on the highway and they don't care

I didnt want to mention the whole no cat thing, some get "offended". If you can tune the CEL out with no cats or live with the light then it is an option.

I assumed the 5.4 was monitored before and after each cat, if only 1 O2 sens. per bank then yes you would need to get bung plugs if the cats had 2 each of them. I believe Summit would have these also. Now go put an exhaust on your truck, so I can stop saying "bung, and bung plug".

Apr 22, 2016 | 03:29 PM

#20

Mike189677

Fleet Mechanic

Joined: Jan 2012

Posts: 1,841

Likes: 6

Quote:

Originally Posted by 16F350

No need for a tune to turn the check engine light off as long as the truck is obdI it will have one sensor on each side after the manifolds like the picture above shows only the obdII certified Cali emissions trucks have a sensor after the converter for 99-04.

Apr 22, 2016 | 03:50 PM

#21

16F350

Freshman User

Joined: Feb 2016

Posts: 26

Likes: 0

Quote:

Originally Posted by Mike189677

Yea after I posted I thought twice about it, no monitor post cat, no light, duh.
So that works out good if the OP goes in that direction. Plus saves some cash.
Thanks for putting me straight !