cat back for 5.4
Thread Starter
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Elder User
Joined: Sep 2008
Posts: 780
Likes: 0
From: merrimack valley
cat back for 5.4
doesnt seem to be much offered for a cat back system for 5.4 eng
see alot for diesel and v10
is the exhaust the same as far as after cat on 6.8 and 5.4
or will i get same results just replacing muff
2004 F250 ext cab sb
see alot for diesel and v10
is the exhaust the same as far as after cat on 6.8 and 5.4
or will i get same results just replacing muff
2004 F250 ext cab sb
Fleet Mechanic
Joined: Apr 2007
Posts: 1,433
Likes: 7
From: NH
Cat back is basically that. Replacing the muffler with a one in two out but they do have performance single in/out as well.
Go to any Midas/Meineke etc... and they will custom install for you around 300 bucks or less/more depending on your muffler and tips choice.
Review your choices with mufflers on their web sites and get ideas on choices. You can save by buying the muffler and tips and having them install.
Flowmaster, Magnaflow, Borla etc...
Don't waste your money on custom made kits as many times they are made to fit several varieties/versions plus their costly.
Go to any Midas/Meineke etc... and they will custom install for you around 300 bucks or less/more depending on your muffler and tips choice.
Review your choices with mufflers on their web sites and get ideas on choices. You can save by buying the muffler and tips and having them install.
Flowmaster, Magnaflow, Borla etc...
Don't waste your money on custom made kits as many times they are made to fit several varieties/versions plus their costly.
Posting Guru
Joined: Jul 2003
Posts: 1,273
Likes: 3
I had installed the borla cat back on a standard cab 02 F350 V10 4x4 and it fit perfect even though the directions said it fit the extended cab/crew cab only. Later when I bought an 01 F250 V8 rwd standard cab truck, I put the old cat back system from the V10 on the V8 truck and it also fit perfectly. The v8/v10 cat backs are the same .
Posting Guru
Joined: Nov 2005
Posts: 1,519
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From: Wyandotte, Michigan
I just put a kit on from Dynomax/Walker. It's a cat back for the 5.4 and it's a single muffler with dual tailpipes out under the bumper. They offer a super single too with a 4" pipe out the passenger quarter. It helped the performance a little but my superchips flashpaq really woke it up. I ordered that kit along with one of their Ultraflo mufflers, got a nice rumble to it now.
Posting Guru
Joined: May 2002
Posts: 1,589
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From: AK
If you're looking for catback with a single tailpipe then I'd just replace the stock muffler with whatever you like... the stock 3" piping is plenty.
If you want duals I think the only kits available for these trucks are Gibson (junk IMO) and Dynomax.
If you want duals I think the only kits available for these trucks are Gibson (junk IMO) and Dynomax.
Thread Starter
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Elder User
Joined: Sep 2008
Posts: 780
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From: merrimack valley
yeah i wanna go subtle single side exit
so probably just muff anything come close to original dimension
i guess main concern would be length and be it round
so probably just muff anything come close to original dimension
i guess main concern would be length and be it round
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Posting Guru
Joined: May 2002
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From: AK
If you want subtle I'd go with a Flowmaster 70 series or long Magnaflow...
For a little more volume a 50 series or shorter Magnaflow. Center inlet/offset out with a short piece of pipe to make up the difference should fit the bill.
For a little more volume a 50 series or shorter Magnaflow. Center inlet/offset out with a short piece of pipe to make up the difference should fit the bill.
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I wanted dual tailpipes and a little more sound from my truck. I had a Flowmaster on my Chevy 8.1 and it sounded awesome. Wasn't sure what would sound right on my Ford as Flowmaster offers so many choices. I took a gamble and went with the super 40's, one step down from their loudest. I thought the truck was going to sound like a jet engine from 5 ft away, but when it was started, I couldn't believe how quiet it was. Seems the ford cats muffle alot of sound. The truck is a little more quiet than I wanted but acceptable. The chevy's use a less restrictive cat, hence the louder sound.
Posting Guru
Joined: Nov 2005
Posts: 1,519
Likes: 1
From: Wyandotte, Michigan
I wanted dual tailpipes and a little more sound from my truck. I had a Flowmaster on my Chevy 8.1 and it sounded awesome. Wasn't sure what would sound right on my Ford as Flowmaster offers so many choices. I took a gamble and went with the super 40's, one step down from their loudest. I thought the truck was going to sound like a jet engine from 5 ft away, but when it was started, I couldn't believe how quiet it was. Seems the ford cats muffle alot of sound. The truck is a little more quiet than I wanted but acceptable. The chevy's use a less restrictive cat, hence the louder sound.