hey darren i searched around and got most info on mangnaflow cats #94106 and having the o2 sensor (bunged) dont know what that means but i figure its welded one inch after the new high flow cats my one issue is on performancepeddler all i can find is 2 1/2 inch tubing but i have 3 inch do they make 3 or is 2 1/2 my only option thnx for your help or anyone else who chimes in

 

#94109 is the 3" version of the 94106 cats. I had those in my 2500HD. And yes, bunged is implanting a new O2 mount after cats.

 

What's a reasonable price for instalation?

 

Please tell us you didn't go with a 3" true dual system.

 

no i have a 3 inch si/si turn down and i like how she sounds

 

i meant si/so

 

Wait, wait. Have you done anything with the factory stuff before and including the factory "Y"? If not, I am pretty certain that you need the 94106 if it's indeed going on your '08 F-150.

 

Have u guy heard of the new 99000 series from magnaflow there called spun catyliyic converters and there suppose to have a vortex build to them. I was at a stillen is costa Mesa ca and they were telling me about it I was thinking bout just waiting till they were out for sale and getting a set those

 

^ I highly doubt that they will worth the cash...

 

Spun cats are a 4200lb gvwr. You need 6200lb gvwr rated cats, otherwise you will fry the catalyst within a few thousand miles.

 

Just go with the 94106's. I have no earthly idea why you would want 3" diameter cats.

 

for the same reason I want them.

replace my two stock cats with 3" in and out, step the pipe up just after the first cat to 3" into the converter.

Or I guess I could come right off the headers and step up to 3" there, and put a bung in the pipe for the O2 sensor thats right after the flange.

Then into a 3" in/o Y, into a Maganaflow oval 12" or 14" side exit in front of passenger tire, ending with

now if I can just find a premade 3" y for my truck.

#94109 x2
35107 (tip)
12619 X1



Now, you might be thinking, why would i want such a large pipe on a stcok 5.4?

Well because a single 3" is about the same flow/velocity and according to the chat thing i looked up, a single 3" is just slightly less free flowing than a 2.25" dual system.

a single three would be between a dual 2.25" and 2.50" system in terms of flow.

Add in that I am going to side exit in front of the tire, should sound good and cause no problems. (I hope)


Now if I can just find a premade Y that fits my truck.

 

Tell us how that turns out. I'm guessing bad.

 

https://www.f150online.com/forums/ex...eas-i-had.html

why?

what exactly would be bad about it?
I would like to honestly know why you think it would turn out bad.

Like I said, (unless the chart I found is wrong) a singe 3" pipe from a 3" Y would flow some where in the middle of 2.25" and a 2.50" true duals.

as people are running 2.50" true duals I fail to see why a singe 3" would be a bad idea.

Unless there is something I don't know about going on.

But what exactly should I change about that?

Unless I am not understanding DarrenWS6 or we are not on the same level he didn't see any problem with it.

If nothing else I would run a step up from the Y right to a 3" pipe into the 14" maggie then a tip in front of the pass anger wheel.

you your self are running 2.25 on a 4,6 right? I have the 5.4L and a single 3" would be almost the same.

this is where I got the chart.

http://www.fordforums.com/f648/singl...xhaust-135371/

The surface area of a 2.25" pipe is effectively 3.9760782021996".
The surface area of a 2.5" pipe is effectively 4.9087385212341".
The surface area of a 2.75" pipe is effectively 5.9395736106932".
The surface area of a 3" pipe is effectively 7.068583470577".

dual 2.25" piping would be 7.952 just round that up to 7.9 as opposed to a single 3" at 7.068.
Take in that dual 2.50 is 9.81 say 9.

The thread is talking about a 5.4L expy, cant see why there would be a problem on my F-150.

 

well, anyway what i am going to do is look around, and do so more reading and go from there.

Nothing is set in stone yet.