6.0 EXHAUST HELP PLEASE
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7th Gear
Joined: Oct 2022
Posts: 7
Likes: 3
From: Southern California
6.0 EXHAUST HELP PLEASE
I've got an 04 6.0 pretty much stock except for a couple upgrades, nothing performance wise except for the Airaid Cold Air intake. I'm looking to finally upgrade my exhaust from the turbo back. I have been trying to find videos, but they all delete the cat and as I am in Ca, and I can't delete the cat (believe me I would if I could, but the fine is huge for that down here). So, I've been looking at the MBRP SLM series Turbo Back System with a muffler delete retaining the factory Catalytic Convertor. I'm having trouble deciding on a 4" or 5" exhaust kit. The kits come with a 3.5" downpipe, and I'm wondering if it would make any difference performance and sound wise going to a 4" downpipe. My goal is to get more of that turbo whistle all though being an early 04 it has plenty upfront while helping it breath better. If anybody has any experience with these kits retaining the cat or have videos of the 4- and 5-inch kits installed, I would greatly appreciate the Help.
Thanks
Tim S
Thanks
Tim S
Cargo Master
Joined: Aug 2003
Posts: 2,332
Likes: 442
From: Eastern Washington
Muffler delete and 4" will be plenty loud. I have a truck with cat delete and muffler delete thats obnoxious. I will be putting a muffler on it when it's ready to drive.
Welcome to the forum!
Welcome to the forum!
Laughing Gas
Joined: Mar 2019
Posts: 947
Likes: 144
From: Columbus Ohio
I have an Excursion with just the muffler delete and still have the cat, and the turbo whistles alot! The motor is "throaty" sounding around 1500RPM too. Sounds mean!
FTE Legend
Joined: Jul 2005
Posts: 65,938
Likes: 1,432
From: Millersville, MD
I too HAD deleted the muffler AND the cat but it was way too loud and drew too much attention so I reinstalled the cat. That made it sound perfect. The cat didn't stop the whistle but cut down on the roar enough to please me.
Now putting the truck up for sale. Getting too old for safe driving towing the 5th wheel and have no other use for the great truck. Watch for it in the for sale section. Just less than 74k on it too. Beautiful like new shape. Will post it after getting it inspected here in MD. Extra Clean Low Mileage 2005 F250 XLT Crew Cab LB 6.0 (STUDDED) Diesel - Ford Truck Enthusiasts Forums (ford-trucks.com)
Now putting the truck up for sale. Getting too old for safe driving towing the 5th wheel and have no other use for the great truck. Watch for it in the for sale section. Just less than 74k on it too. Beautiful like new shape. Will post it after getting it inspected here in MD. Extra Clean Low Mileage 2005 F250 XLT Crew Cab LB 6.0 (STUDDED) Diesel - Ford Truck Enthusiasts Forums (ford-trucks.com)
Fleet Mechanic
Joined: Nov 2015
Posts: 1,487
Likes: 217
I've got an 04 6.0 pretty much stock except for a couple upgrades, nothing performance wise except for the Airaid Cold Air intake. I'm looking to finally upgrade my exhaust from the turbo back. I have been trying to find videos, but they all delete the cat and as I am in Ca, and I can't delete the cat (believe me I would if I could, but the fine is huge for that down here). So, I've been looking at the MBRP SLM series Turbo Back System with a muffler delete retaining the factory Catalytic Convertor. I'm having trouble deciding on a 4" or 5" exhaust kit. The kits come with a 3.5" downpipe, and I'm wondering if it would make any difference performance and sound wise going to a 4" downpipe. My goal is to get more of that turbo whistle all though being an early 04 it has plenty upfront while helping it breath better. If anybody has any experience with these kits retaining the cat or have videos of the 4- and 5-inch kits installed, I would greatly appreciate the Help.
Thanks
Tim S
Thanks
Tim S
why can’t you have the cat body cut and weld a 4 inch pipe on there and then put it in the 4 inch exhaust. A muffler shop should be able to cut and stretch the neck out a bit to make a slip collar that they can we,d a piece of 4 inch to
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mrw1125
6.0L Power Stroke Diesel
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Jan 10, 2004 07:45 AM
