muffler delete or 4 inch
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Senior User
Joined: Apr 2007
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muffler delete or 4 inch
What is the difference in flow and exhaust temps between a stock exhaust with a muffler delete and a 4 inch exhaust with a muffler. I have a stock exhaust now with the muffler delete and was wondering how much of an advantage a 4 inch would be. By the way, the muffler delete sound sweet
Post Fiend
Joined: Jul 2005
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From: 21791
The major part of the exhaust system is the larger downpipe. That helps lower temps because there is less restriction for the exhaust gasses to exit the turbo. The 4" downpipe is 56% larger cross-sectional area compared to the stock 3" downpipe. To add to it, the bends are mandrel bent, smoother than the kinked stock bends. But Cookie is right, on a stock-tuned truck you won't see much of a difference. Maybe a deeper tone.
Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
Yo' Kris... He has the DP with 120 Race & 80 Econo -- I think the 4" will make a noticeable difference.
BTW, my DP will be here next week. I can hardly contain myself.
Can't wait to
some of these d@mn ricers around me -- they're like gnats on a muggy summer night...
Joe
BTW, my DP will be here next week. I can hardly contain myself.
Can't wait to
some of these d@mn ricers around me -- they're like gnats on a muggy summer night...Joe
Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
Originally Posted by Kwikkordead
Only 4" ???? 
*I* happen to like the sound of my 4" MBRP...
Joe
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Elder User
Joined: Jul 2006
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From: Vancouver, Washington
deemac-
not to side track, but I am thinking of doing a 4" with glass pack myself. Is yours a muffler delete with glass pack or muffler delete with straight pipe? I want to get a bit of mileage, lower EGT's and a little note. I keep looking at MKO 4" kit. Just don't want it to loud. A little note while cruising, more note while passing all the Dodges and Bowties.
Also, somebody mentioned the downpipe was 3". If I'm not mistaken, the proven 7.3 downpipe is 3.5" and the 6.H0 is 3". Sorry, love my 7.3
not to side track, but I am thinking of doing a 4" with glass pack myself. Is yours a muffler delete with glass pack or muffler delete with straight pipe? I want to get a bit of mileage, lower EGT's and a little note. I keep looking at MKO 4" kit. Just don't want it to loud. A little note while cruising, more note while passing all the Dodges and Bowties.
Also, somebody mentioned the downpipe was 3". If I'm not mistaken, the proven 7.3 downpipe is 3.5" and the 6.H0 is 3". Sorry, love my 7.3
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Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
The MBRP is 4" from turbo to bumper, and the muffler is straight through (like a glass pack). Guzzle has some clips of his here:
http://guzzle.rbmicro.com/mbrp.html
These were the clips that convinced me to get it. Like I said, I like the sound...
Joe
http://guzzle.rbmicro.com/mbrp.html
These were the clips that convinced me to get it. Like I said, I like the sound...
Joe
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
Originally Posted by Kwikkordead
Yeah, they do sound good. I'm just ribbin' you all.
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
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From: Cabot, Arkansas
Originally Posted by Kwikkordead
Now I have stack envy again. 
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Yeah, that's why I don't have stacks.
I've often toyed with the thought of having a changable tip on the stacks that I would install just for the trip.
But that idea quickly gets canned as I don't want to be working on my truck while I'm out on vacation. So the side pipe remains.
It sounds just like a stack so I'm happy enough with it.
I've often toyed with the thought of having a changable tip on the stacks that I would install just for the trip.
But that idea quickly gets canned as I don't want to be working on my truck while I'm out on vacation. So the side pipe remains.
It sounds just like a stack so I'm happy enough with it.