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-   -   Help me understand (https://www.f150online.com/forums/2004-2008-f-150/275603-help-me-understand.html)

DTheobald 03-01-2007 03:42 AM

Help me understand
 
I am tryng to understand the whole exhaust/muffler/cats stuff.... i was getting help from Weazel... and i made my own crappy picture on windows paint... Am I missing anything of major importance to undertand the exhaust?

Go easy on me, i'm a chick... :D

http://i62.photobucket.com/albums/h8...tomoftruck.jpg

sandyf150 03-01-2007 09:52 AM

thats pretty much it

ROBFX4 03-01-2007 09:59 AM

You have them labeled as cats, There are actually 4 of them, 2 on each side, a smaller set right behind the manifolds and 2 larger underneath your cab.

Edit: There is also the O2 sensor connected to one of the cats as well.

khendrix2374 03-01-2007 10:05 AM

Actually... her truck is a 2007... her drawing is correct. One cat for each exhaust bank.

Yes. You got the pic correct.

ROBFX4 03-01-2007 10:08 AM

Odd, I didnt know they removed 2 of them? Is that just the 2007 or the 2005/6 as well?

khendrix2374 03-01-2007 10:16 AM

Don't remember.. either 05+ or 06+.. 2006 and up for sure.

DTheobald 03-01-2007 11:26 AM

Cool... But when you guys talk about glass packs... what does that mean?

Weazel told me the less things that disrupt the pipe the louder it is, hence removing the cats, and muffler... but what are glass packs? Where do they go and what do they do?

Budha05STX 03-01-2007 11:32 AM


Originally Posted by khendrix2374
Don't remember.. either 05+ or 06+.. 2006 and up for sure.

My '05 has 2 cats. :fyi:

FX4 Matt 03-01-2007 11:33 AM


Originally Posted by Budha05STX
My '05 has 2 cats. :fyi:

Mine too

Silverfish 03-01-2007 11:36 AM


Originally Posted by FX4 Matt
Mine too


Mine also only has 2!

Tbird69 03-01-2007 11:44 AM


Originally Posted by DTheobald
Cool... But when you guys talk about glass packs... what does that mean?

Weazel told me the less things that disrupt the pipe the louder it is, hence removing the cats, and muffler... but what are glass packs? Where do they go and what do they do?

A glass pack is just a name for a loud muffler. It's just basically a straight pipe with fiberglass in it to provide some sound control. Most people install them because they flow through with little or no restriction and make the exhaust nice and loud. They go in place of the stock mufflers.:cool:

Click the link to see what they look like.
http://www.cherrybomb.com/glasspacks-front.html

DTheobald 03-01-2007 12:48 PM


Originally Posted by Tbird69
A glass pack is just a name for a loud muffler. It's just basically a straight pipe with fiberglass in it to provide some sound control. Most people install them because they flow through with little or no restriction and make the exhaust nice and loud. They go in place of the stock mufflers.:cool:

Click the link to see what they look like.
http://www.cherrybomb.com/glasspacks-front.html

Thanks TBird :)

Tbird69 03-01-2007 01:06 PM


Originally Posted by DTheobald
Thanks TBird :)

Glad I could help.:wave:

DTheobald 03-01-2007 01:37 PM

So is there a reason why people replace the headers/manifolds? Are the stock ones not good enough?

Tbird69 03-01-2007 02:14 PM


Originally Posted by DTheobald
So is there a reason why people replace the headers/manifolds? Are the stock ones not good enough?

The stock manifolds are a compromise between power, performance and economy. The result is this design makes them very inefficient at moving the exhaust out of the motor. Installing headers improves the exhaust flow by giving each cylinder it's own pipe. A properly tuned header will actually pull the burnt gases out of the cylinder. The pipes come together at the collector which then connects to the exhaust pipe. All this helps the engine to run more efficiently and build more power. An air intake system with a proper header and exhaust can improve power and torque by 15% or more over stock.:cool:


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