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Old 12-15-2010, 06:46 PM
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Quiet Exhaust

Hi I was looking to replace my 03 6.0 exhaust to a true turbo back 4" stainless if the price is right. My question is what is the quietest exhaust you can get without a cat? I love the turbo on my 03 but it is my family's primary truck so I don't want to hear everone say it too loud. I have looked at the magnaflow single outlet 4" and it looks pretty good.

Does the exhaust do anything to the fuel mileage without a tuner? Or should I keep the stock exhaust and delete the cat and maybe replace the muffler with something else. I can do all the work as far as hanging the custom/stock exhaust. Funds are a major factor, looking for mileage not power.
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Old 12-15-2010, 07:02 PM
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US Diesel Parts: High Performance Diesel Parts for Duramax, Cummins and Power Stroke has them cheap. Doing an exhaust helps you all around, the biggest change is lower egt's.

Get a 4" TB with a flow through muffler, that will make a big impact on the sound.

On your truck the difference between delete pipes(and a flow through muffler) and 4"TB is the low end TQ and the sound. Very very little difference in egt's.
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Old 12-15-2010, 07:21 PM
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Smoker steve,

I'm interested in the op questions too. Are you able to clearify or elaberate alittle?

I'm thinkin about removing my Cat, and changin the muffler to a free flow, but I think I might have some code problems cause I'm pretty sure there is a sensor either the Cat or Muffler
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Old 12-15-2010, 07:23 PM
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my friend has an 06 with a 4 inch turbo back silverline exhaust with no cat and its quite unless you romp on it!
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Old 12-15-2010, 08:40 PM
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There are no sensors in the exhaust, BTW.
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Old 12-16-2010, 05:32 AM
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Quote:
Originally Posted by TRouth302 View Post
Hi I was looking to replace my 03 6.0 exhaust to a true turbo back 4" stainless if the price is right. My question is what is the quietest exhaust you can get without a cat? I love the turbo on my 03 but it is my family's primary truck so I don't want to hear everone say it too loud. I have looked at the magnaflow single outlet 4" and it looks pretty good.

Does the exhaust do anything to the fuel mileage without a tuner? Or should I keep the stock exhaust and delete the cat and maybe replace the muffler with something else. I can do all the work as far as hanging the custom/stock exhaust. Funds are a major factor, looking for mileage not power.
I have an 03 w a 4" turbo back w no muffler or kitty and really its not that bad... You wont take the "familyness" out of it... Its really only loud when you want it to be... It will whistle up to about 1800 rpms and then roars like a v8 over that if you punch it. Windows up and driving normally you wont even notice its there!
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Old 12-16-2010, 07:13 AM
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On bikes, if you reduce the designed back pressure, by removing restrictions (muffer or baffles) you loose torque (hence power). Is it the same with these diesels?
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Old 12-16-2010, 07:40 AM
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Quote:
Originally Posted by Horsestrokin View Post
On bikes, if you reduce the designed back pressure, by removing restrictions (muffer or baffles) you loose torque (hence power). Is it the same with these diesels?
NO! Exhaust back pressure is the enemy of ANY turbocharged engine as it fights spool up and turbine speed. Back pressure is only needed in naturally aspirated engines.

I have run my truck with muffler on and muffler off. It has a 4" Magnaflow TB into duals. With the muffler on and just cruising it may have been quieter than stock until you romp on it and then it has a very nice growl. It was too quiet for me so the muffler sits in the garage and has been for the last 2 years. Taking it easy it is not obnoxiously loud. Romping on it brings down the wrath of Thor.
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Old 12-16-2010, 08:15 AM
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Quote:
Originally Posted by Horsestrokin View Post
Smoker steve,

I'm interested in the op questions too. Are you able to clearify or elaberate alittle?

I'm thinkin about removing my Cat, and changin the muffler to a free flow, but I think I might have some code problems cause I'm pretty sure there is a sensor either the Cat or Muffler
Cat delete pipes.
03-07 Ford 6.0 Powerstroke Calytic Converter Test Pipe

03-07+ Ford 6.0L Powerstroke Diesel Cat Delete Pipe

Diamond Eye Cat Converter Test Pipe 03-07 6.0 Ford (Aluminized) 125032 | Exhaust Components | 03-07 6.0L Power Stroke | Ford Power Stroke | Diesel Power | Performance Truck Products


Muffler delete pipe.
99-05 Ford Excursion Powerstroke Diesel Stock Muffler Delete Pipe



Honestly the sound of the delete pipes is not very loud, unless you put a heavy foot on the peddle. I put a double layer exhaust tip with packing in the 2 walls and that decreased some of the SSSSSSHHHHHHHHHHHHHH sound from a straight pipe.

Get the delete pipes. If it is too loud, get a flow through muffler for a 3.5" exhaust. Then pick a spot to put it in.

I purchased the exhaust tip for the looks. The decrease in sound was an added bonus. I will take a video in the next few days to show you the difference.
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  #10  
Old 12-16-2010, 11:39 AM
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sounds good, I would like to hear what it would sound like.
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