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6.4L Performance Parts Discussion What has or has not worked for you?

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post #1 of 14 Old 10-02-2009, 12:48 AM Thread Starter
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Exhaust??

I currently have a 4" flo-pro delete pipe with a mbrp single back exhaust and was thinking about putting a muffler on. How much quiter will it be if I do this? Also those who have a single stack what kit are yall going with with?
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post #2 of 14 Old 10-02-2009, 01:19 AM
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I have a magna flow system with a muffler and my buddy has one without and honestly there is little difference. Now I do have the free flow muffler so there is very little to actually muffle the sound

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post #3 of 14 Old 10-02-2009, 01:23 AM
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Quote:
Originally Posted by benbou00 View Post
I currently have a 4" flo-pro delete pipe with a mbrp single back exhaust and was thinking about putting a muffler on. How much quiter will it be if I do this? Also those who have a single stack what kit are yall going with with?
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I have a magna flow system with a muffler and my buddy has one without and honestly there is little difference. Now I do have the free flow muffler so there is very little to actually muffle the sound

I agree it will not get much quieter, unless of course you want to give up some more freeness in the flow of your exhaust to lessen the noise factor.


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post #4 of 14 Old 10-02-2009, 04:55 AM
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A muffler on a 6.4L really changes the sound of it for the better in my opinion! We can hook you up with a lil' shorty muffler if your interested because I know there is not many places to put a muffler on stack kits!

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post #5 of 14 Old 10-02-2009, 06:03 AM
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I've played around with mine and I really like the sound of my truck without the muffler, the truck is not loud by any means compared to a Cummins or 6.0 so I am just rocking the straight pipe. I notice about a 75 degree drop in temps at cruising speed when I am without a muffler too.

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post #6 of 14 Old 10-02-2009, 09:29 AM Thread Starter
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Ok thanks just considering a few options before I make a decision.
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post #7 of 14 Old 10-02-2009, 10:25 AM
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I personally think it makes a pretty big difference on sound between with/without muffler. I ran my truck straight 5" for a couple months, then went to a muffler. Will not got back to straight. There is a little too much whistle / air movement sound with a straight pipe. The muffler seems to calm the sounds a bit and give it a nice throaty tone.

I have also found that between different brands of mufflers, you will get entirely different exhaust sounds. I have yet to hear a no muffler stack kit installed, but i bet its pretty loud. Some of our test trucks have merely a dump pipe installed right after the downpipe, too loud for my taste!

Get us some pics of what you end up doing! Lets put that rig on our customer gallery section. Bennet was one of the first to purchase a 6.4 Black Maxx from us.
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post #8 of 14 Old 10-02-2009, 10:31 AM
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Originally Posted by H&S Tech View Post
I personally think it makes a pretty big difference on sound between with/without muffler. I ran my truck straight 5" for a couple months, then went to a muffler. Will not got back to straight. There is a little too much whistle / air movement sound with a straight pipe. The muffler seems to calm the sounds a bit and give it a nice throaty tone.

I have also found that between different brands of mufflers, you will get entirely different exhaust sounds. I have yet to hear a no muffler stack kit installed, but i bet its pretty loud. Some of our test trucks have merely a dump pipe installed right after the downpipe, too loud for my taste!

Get us some pics of what you end up doing! Lets put that rig on our customer gallery section. Bennet was one of the first to purchase a 6.4 Black Maxx from us.
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post #9 of 14 Old 10-02-2009, 10:54 AM Thread Starter
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Yea I've been wanting to put some pics on there maybe I'll get around to it this weekend. Now in the muffler situation I still would like to have a throaty sound to it so what muffler would you recommend for that but will I lose the whistle I'm getting now because I really enjoy the sound of that?
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post #10 of 14 Old 10-03-2009, 06:23 AM
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Quote:
Originally Posted by benbou00 View Post
Yea I've been wanting to put some pics on there maybe I'll get around to it this weekend. Now in the muffler situation I still would like to have a throaty sound to it so what muffler would you recommend for that but will I lose the whistle I'm getting now because I really enjoy the sound of that?
I am running a magnaflow and it still has the turbo whistle plus the throatiness. I believe the sound that everyone craves is really freed once the cat/dpf are removed, I still mos. after pulling mine off can't help from grinning everytime I shut the truck down and hear the turbo impeller spin whistling down to rest. People are like WTF is that noise?
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