Choosing a good exhaust system

[Gruz7]

Hi guys,

Figured I'd just start a new thread on this.
I'm trying to build/buy a new exhaust for my 2006 5.4 3v. I had a magnaflow catback with stock cats and headers on my previous 03 and it sounded pretty good.
I'm looking to probably get the same magnaflow catback for my 06 but after that I'm not sure what I want to get or have built.
I would love to replace the cats as well... I know doing that I would need to get the drivers and passengers side but do I just get any old set from rockauto? I think the brand I looked at was Walker they had both left and right sides cats for a decent price.

If I could I would love to run only one cat but I don't think that's possible with the O2 sensors? Once again this is really my first time tacking catalytic converters so I'm slightly in the dark here.
I want a good somewhat loud tone but I want to retain performance or maybe even gain performance of i could. I don't really want to do a muffler delete because that's not the sound I want;
So basically my question is, with the magnaflow catback and stock headers what should I do about the cats to get a good loud sound and keep the trucks performance level optimal?
Any suggestions are really appreciated!
Thanks guys


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[GAINMOB]

U can run 2 cats and remove 2 since they come with 4 cats...I have Flowmaster and love the sound and drone noise...most mufflers brands offer cats as well...since u want to be loud u might have to do a dump...u can also go glasspacks

Mr. 10K

 

[Gruz7]

U can run 2 cats and remove 2 since they come with 4 cats...I have Flowmaster and love the sound and drone noise...most mufflers brands offer cats as well...since u want to be loud u might have to do a dump...u can also go glasspacks

Mr. 10K

Looking underneath my truck right now though it looks to have 4 O2 sensors and only 2 cats... Up near the flange to connects to the manifold it has an O2 sensor on each side then further back it has 2 cats (one on each side) and those have O2 sensors plugging into them.. Maybe it isn't actually a stock setup? And how would I dump it just slice the tip off near the spare tire like jeeps do?


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[Gruz7]

I mean mine have a lot of surface rust on them but they look almost exactly like these from Evan Fischer ....


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[GAINMOB]

Sound like delete was already done...the "dump" to my knowledge...anyone can correct me if I'm wrong...there isn't a muffler at all...it's cut right after the cats and the tubing points down...super loud

Mr. 10K

 

[Gruz7]

Interesting... So since they seem to only have surface rust and no damage maybe I'll just keep the cats on there for now... And oh yeah I've heard those lol muffler delete is REAL loud... Not sure if that's how hard I want to go or not... Might get the magnaflow catback and put that on with the current stock headers and my 2 cats and see how that sounds to me...

Now that I think about it my expy seems a bit louder than my buddies expeditions both have stock exhausts and I "thought" mine was stock


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[Maloburro]

For some reason I think flow masters sound really good on ford v8s. If you're going to have a shop fab you something dual side exits would be cool. Gladspacks are better for that setup. I'm not sure how they would sound but I remember side exit glasspacksnsound killer on an old 440 dodge, Ac cobra, corvette, etc.

 

[Gruz7]

For some reason I think flow masters sound really good on ford v8s. If you're going to have a shop fab you something dual side exits would be cool. Gladspacks are better for that setup. I'm not sure how they would sound but I remember side exit glasspacksnsound killer on an old 440 dodge, Ac cobra, corvette, etc.

Hmm.. Not a bad option, so far I'm leaning towards just a brand name catback system like magna or flow... My 03 had the magnaflow and sounded pretty good but just wasn't quite as loud as I would have liked.
Flowmaster says moderate/mild tone all over theirs so idk if that's where I'll head either.. We'll see


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[GAINMOB]

Go on their site...40 series is loud

Mr. 10K

 

[Gruz7]

Go on their site...40 series is loud

Mr. 10K

Will do



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[GMW468]

I'm doing my research as well. I had a single in dual out Magnaflow muffler set up on my previous truck which was an 02 F150 crew cab. I had dual pipes exiting on each side of the tow hitch along with a stainless steel tip and it really sounded good. It was mild at idle but had a nice rumble as you drove.

I'd love to have a similiar set up on my 05 Expedition, but I can't seem to find anyone who has a dual out set up on an Expedition like my F150.

If you want a really nasty sounding muffler, check out Spintech. I have a 3" dual exhaust system on my 68 Chevelle behind a 600HP big block with dual 3" Spintech mufflers and my car sounds nasty as snot. I can set off car alarms just by driving by and my wife can hear me coming home from far away.

 

[GAINMOB]

It can be done but not straight through like on F150...either real small pipe due to the suspension setup OR go to center of truck and meet at the pumpkin and out to each side...long discussion on this if u search dual exhaust or duals

Mr. 10K

 

[Gruz7]

Yeah I hear for duals you gotta remove the spare ... I'm just gonna go with a single exit


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[GAINMOB]

Yeah but u can put the spare back on I believe

Mr. 10K

 

[Gruz7]

So here's my new plan/thinking... Might be pricing but whatever I guess...
I'll get the magnaflow catback and after the cats where the magnaflow muffler would normally be I will buy an aftermarket resonator and delete the muffler so it'll be almost straight piped while retaining the cats... Don't know how it will sound but my Reasoning is a buddy of mine with a 5.0 has a 3 in. roush exhaust on his F150 and it has stocks and only a resonator and sounds absolutely beastly


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[stamp11127]

I can tell you how it will sound - "Red Neck Get R Dun". We have a few students with that "*******" sound on their lifted trucks. Blap-Blap-Blap-Blap. SLS (sounds like .....)
Just run open headers instead of straight pipes. Will sound better until your hearing goes....

 

[Maloburro]

I would not bother with buying a magnaflow and then fabbing in exhaust work. I would either get a catback and call it a day or take it to a good exhaust shop and fab from catback.

If you know what you want, a good shop will do it, and do it right. It shouldn't cost too much, if at all more than a catback. Less if you supply the muffler.

That being said, I've heard most stock catbacks flow pretty well these days. There should be loads of YouTube threads of 5.4 3v f150s with various setups that should help you ballpark a sound.

 

[GAINMOB]

I can tell you how it will sound - "Red Neck Get R Dun". We have a few students with that "*******" sound on their lifted trucks. Blap-Blap-Blap-Blap. SLS (sounds like .....)
Just run open headers instead of straight pipes. Will sound better until your hearing goes....

BWAHAHAHAHA!!!

Mr. 10K

 

[Gruz7]

Lol stamp.... Ok so since I was planning on doing it quick I guess I'll stick to the magnaflow catback... I don't really need super loud anyways so that will be good... Should be a little louder when I get the k and n on and a slight tune


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[tallsville]

With "dumps" and side exhaust you usually see on trucks, under the bed. You usually don't see on SUV's due to the possibility of exhaust fumes coming into the cab, especially when you are standing still(stop light, traffic, etc).