Exhaust improvements - Ford Powerstroke Diesel Forum

6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 11 Old 12-17-2010, 01:05 PM Thread Starter
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Exhaust improvements

I guess I'm going to stay with the the stock 3.5 pipes, but getting the kitty removed, I dont care for alot of noise, And I dont plan to race anyone, or take it to the track so I want to leave the muffer, but wondering if its worth another $135 to replace it with a freer flow muffler for more power and or fuel mileage. Will plan on a programmer after I get my EGT probe installed.

Anyone have a similar experience they can comment on?
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post #2 of 11 Old 12-17-2010, 04:04 PM
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If you are going to choose between the cat and the muffler, delete the muffler.
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post #3 of 11 Old 12-17-2010, 04:05 PM
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If you keep looking you can find a cheaper flow through muffler.
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post #4 of 11 Old 12-17-2010, 04:39 PM Thread Starter
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Steve,

lol...I was looking at it after dark tonight, ....that muffler is much larger than the cat. I was thinking it would be the opposite esp when it comes to resistance to exhust flow


Leaving the Cat, I wonder how that changes the sound vs a strait pipe 3.5 inch.. Now I'm thinking about deleting both, cuase isnt it often that a cat plugs up from all the carbon poop?
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post #5 of 11 Old 12-17-2010, 04:52 PM
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what are you nuts, that cat is as restrictive as that muffler.

My suggestion if you really dont want to remove the stock exhaust, is do a cat delete pipe and a 35-35xl aero turbine muffler for get the flow and quiet tone like you want.

But if you do any towing or harder driving, i would do a 4 inch turboback straightpipe and throw a aero turbine 4040xl muffler on it

the 4 inch will drop our egt's considerably over the 3.5 inch
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post #6 of 11 Old 12-17-2010, 04:54 PM
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post #7 of 11 Old 12-17-2010, 04:56 PM
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Quote:
Originally Posted by pizza pig View Post
what are you nuts, that cat is as restrictive as that muffler.

My suggestion if you really dont want to remove the stock exhaust, is do a cat delete pipe and a 35-35xl aero turbine muffler for get the flow and quiet tone like you want.

But if you do any towing or harder driving, i would do a 4 inch turboback straightpipe and throw a aero turbine 4040xl muffler on it

the 4 inch will drop our egt's considerably over the 3.5 inch
For stockish trucks, the difference between egt's with delete pipes and a full 4" TB, is little.


if you want to get a 3.5 to 4" or full 4" TB, here is a cheap site.

US Diesel Parts: High Performance Diesel Parts for Duramax, Cummins and Power Stroke
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post #8 of 11 Old 12-17-2010, 05:12 PM Thread Starter
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Smoker steve

What is this: a double layer exhaust tip with packing in the 2 walls and that decreased some of the SSSSSSHHHHHHHHHHHHHH sound from a straight pipe.


I didnt understand it....Maybe I need another beer
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post #9 of 11 Old 12-17-2010, 05:19 PM
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Smoker steve

What is this: a double layer exhaust tip with packing in the 2 walls and that decreased some of the SSSSSSHHHHHHHHHHHHHH sound from a straight pipe.


I didn't understand it....Maybe I need another beer
It was from kregan O'reilly auto parts.

It has 2 layers of metal. The outer has the chrome look. the inner has perforations. in between the 2 metal layers is some kind of wrapping.

I am looking for pictures right now.
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post #10 of 11 Old 12-17-2010, 05:20 PM
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