I have a 2000 5.4L 4x4 regular cab. I want to put a 3" magnaflow set-up on. What type of muffler do I get? I think I need an oval type center in/out, however which size...4x9? 5x8? or 5x11"...what's the difference?

 

I went to this web site and did a search for my 1998 F150 4X4 5.4L and received the 12368 part number for the magnaflo and pipes.
http://shop.ivalueinternet.com/bigex...gory_id/39.htm


Best of luck

Steve

 

The size of the canister just correlates to relative sound level. The smaller the canister, the louder. Pick what you'd like.

 

APT

That's what I thought. Then I get the following email from Magnaflow technical services:



bigger the muffler the louder. 22" length is fine. I'd go with a 5x11"
muffler. Thanks

Adam Rozance
Technical Assistance
MagnaFlow Performance Exhaust

What's up with that??

 

Wow, I am surprised! Larger = more insulation = quieter was what I have been told. You know all the import cars with the small 6" canister mufflers are loud, yet a V8 with large straight through Magnaflow are tame. Maybe others can chime in I guess. When in doubt, pick the middle of the road.

 

Wierd... maybe that guy is a newbie and got confused. Smaller cased mufflers of the same model/type are always louder than ones with larger cases. Just like glasspacks... shorter they are the louder, longer ones are deeper and more mellow.

 

APT,

You are correct bigger is quiter. I'm a Magnaflow Distributor and it goes by size.

shoboat90:
How load do you want it?

If you want it super load then run the 5x8x14 part# 12219
If you want it just load then run the 5x8x18 part# 12249
If you want it quite then run the 5x11x22 part# 12579

All these are 3" single in/out mufflers

I do have a sound file of the 5x8x18 if you want to hear what it sounds like in the cab of the truck under hard acceleration.

Later,
Joe

 

shoboat90,

While they are not the Maganflows, the Bassani has some pretty large mufflers on it, and it is loud under WOT, but under less then 50% TPS, the sound is quite.

I don't know if the sound level and note are loud by the size of the muffler, or from the tips on the system.

It is a louder system then the Gibson ST under WOT, but with a better sounding note.

Kind of crappy pics, I need to get better ones, but you can get an idea of how much length there is on a SCrew body layout.
Start of mufflers by cross member:
https://www.f150online.com/galleries...1916-50279.jpg
End of muffler by fron spring shackle:
https://www.f150online.com/galleries...1916-50281.jpg

The sound could be amplified by the type of tips used on the system:
https://www.f150online.com/galleries...1916-50278.jpg
Guess a more detailed answer would be when do you want it louder, during TPS > 80%, or all the time so it has that 60s era lopping cam sound at idle. ???

Got me, thought I might pass on something that I foudn out after the switch.....maybe it is not the same as Magnaflow's design ???

Steve

 

Jucied

I'd love to hear those sound files. Can you either post them or email them to me?

thanks

 

shoboat90

Ok I'll email the 5x18x22 and the 5x11x22 sound file to you.

 

Here is the 2 sound files if anyone is intrested.

Mangnaflow 5x11x22 Part# 12579 Sound File

Magnaflow 5x8x18 Part# 12249 Sound File

Joe

 

Juiced,

I posted this question under 'Drivetrain\Exhaust' earlier today and just seen\read your reply below that you are a Magnaflow Distributor.

Perhaps you might know the answer to my question?

What muffler does MagnaFlow include in their #15609 kits (I need p/n’s).

Thanks,

 

MrTude,
It's most likely going to be the #12579 as they recomend that for all big engine setups. But I would need to double check tommorow once I get back to the shop.

Joe

 

Which motor are those sound clips from, the 5.4? Is that a dual out or muffler replacement?

Do you have any sound files on the 4.6?

 

Not the 12579. First, it is stainless so maybe the 14579. But, looking at pictures of the system on here and other members show it is a center/offset type. According to how the pipe narrows down at where it mounts up I assume it is 3" internal pipe diameter. Either #14229 or 14589 depending on the size which I think is the larger.