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Discussion Starter #1
I need some feed on how much louder it is than stock because as soon as the code free comes out itll be on my truck right now i have a four inch dpf back mbrp exhaust so just wonderin how much louder thanks guys
 

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Hardly any with just a delete. If you get a down pipe you can hear a little but if you want noise you'd better get a 5" tbe. I'm happy with the delete and downpipe combo, I've grown out of my "I like it loud" stage, that's what my bikes are for.
 

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Discussion Starter #3
damn i was hoping it was gonna be some what like my old 5.9 i knew i shouldve never gotten rid of it. what kinda bikes you got
 

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I got an 07 CRF450 that I race intermediate with. I also got a CR500 and ATC250r for the dunes. After a day at the track with a bunch of 4 strokes, I'm down for a relaxing ride home. I'm only 25 but sometimes I sound like and old man. It hurts to move today, damn track had huge holes with some knarly uphill ruts, and them punk A$$ kits on their daddy's dime don't care that I have to go to work the next day. They aint got any problems takin you out to win practice.
 

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My 5" straight back is very loud under load and when the exhaust brake is on, sounds like a jet engine.

At 70mph it is noticeable but not annoying. Personally, I'm glad I went with the 5" over the 4.
 

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Not terribly loud, like jpark said, noticeable at 70 MPH, E-brake like a jet engine. You can hear clips on Youtube.
 

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Yeah I'm still lookin at a 5" system but I don't know if the wife's gunna go for it. I like the noise under load but hate the drone at 70. I've heard good things about the Corsa getting rid of the drone. Anybody got any input of a good sounding low drone muffler/tip combo? If I had confidence in a low drone muffler, I'd get a 5" in a heartbeat.
 

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Yeah I'm still lookin at a 5" system but I don't know if the wife's gunna go for it. I like the noise under load but hate the drone at 70. I've heard good things about the Corsa getting rid of the drone. Anybody got any input of a good sounding low drone muffler/tip combo? If I had confidence in a low drone muffler, I'd get a 5" in a heartbeat.


My drone is at 1500rpm or 60mph. I also don't have a muffler so maybe someone with a muffler on their 5" system will be able to tell you if they have the drone or not.
 

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I asked Shane from BAPD, He said there is no drone with the muffler.:thumbsup
 

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Sounds like I'm lookin at a 5 incher with a muffler but crazzycummins6.7, go with the straight. Thanks guys
 

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Just a quick question for who ever see this, but i was wondering why the EB on our truck sounds like a jet and not like a jake brake? Is the jake just a totally different set up?
 

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A Jake brake actually holds the exhaust valves shut, the way our break works it by reducing the volume in the exhaust housing of the turbo, causing backpressure similar to a Jake brake, one of the side affects is that it spools the turbo causing the "jet" sound.
 
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A Jake brake actually holds the exhaust valves shut, the way our break works it by reducing the volume in the exhaust housing of the turbo, causing backpressure similar to a Jake brake, one of the side affects is that it spools the turbo causing the "jet" sound.
:agree2::agree2::agree2::agree2:
 

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i have the full 5'' system with the muffler and my friend has the same thing without the muffler. eb sounds real cool without the muffler but i cant take the drone sound his makes.
 

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Discussion Starter #15
How will it sound if i do the 4inch downpipe and delete with no muffler straight through cause i have the mbrp 4inch on now any info would be appreciated.
 

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I get a little of the jake brake sound out of mine when I'm slowing down a load with the exhaust brake. I hear it more than I hear the whistle of the turbo.
 

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The four inch downpipe will get rid of the cat, which restricts most of the sound. With the downpipe and delete and filter back you already have, it will be a 4" TB, so it should sound good. Not as deep as the 5" exhaust, but still a lot better than stock or with the original downpipe. :thumbsup
 

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to answer your question...its got a good tone with the 5inch tbe but its
not even close to a straight piped 5.9
 

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Discussion Starter #19
man this sucks i knew i shouldnt have gotten rid of the ole 5.9 she sounded like a semi now this new 6.7 sounds like a gasser its so week i hate tree huggers and the epa.
 

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The full TBE sounds pretty darn good man. I missed my 2nd gen pretty bad untill yesterday. You need to go for a ride in a 6.7 with a 5" TBE.
 
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