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Old 08-21-2012, 04:45 AM   #29
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Originally Posted by rabidcat77 View Post
Anybody have any recordings of what it sounds like with the muffler delete? I have the GMPP mufflers as well instead of the stock ones for the automatic.
Here is a before and after muffler delete vid I did on my otherwise completely stock LS3. A fairly good contrast, and includes a drive-by after the delete as well. I hope this helps as a reference, even though mine is LS3.
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Old 08-21-2012, 11:50 AM   #30
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Sounds mean as hell, is it pretty loud? Cause I know if you throw any kind of muffler on it will quiet up a bit
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Old 08-21-2012, 12:38 PM   #31
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Originally Posted by hsoj10 View Post
How does it sound with your AFM? I have GMPP mufflers on mine. Thinking about cutting out the resonators up front but worried about the drone.
The Flowmaster catbacks have no resonator, just straight pipes from the cat back to the mufflers. There is some drone at lower RPMs & when AFM kicks in but depends on your sensitivity to noise whether this will bother you or not. Sense there is no resonator behind the cat the exhaust noise is more louder both inside and out than the axle back. At least in my opinion some may feel differently. I have them installed on my 2012 L99.
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Old 08-21-2012, 12:58 PM   #32
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How does it sound with your AFM? I have GMPP mufflers on mine. Thinking about cutting out the resonators up front but worried about the drone.
I don't mind the "AFM drone" that I hear.. with the stock exhaust I couldn't hear it..

When I had the flowmaster mufflers on, I "noticed" it.. but I didn't mind it.

With the muffler delete, it's actually quieter at cruising than the flowmasters were. But If you do it, keep the stock center resonator. I imagine the AFM drone would get louder if you converted the center resonator to an x-pipe.
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Old 08-21-2012, 01:04 PM   #33
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You can think that but hearing the rumble is awesome.
My gas mpg went down alittle after my muffler delete,mainly because whenever the afm kicks in I will goose the gas to shut it off. I do most driving now with the paddle shifting and I really enjoy downshifting to a light and let the engine do the braking,the rev match and gurgle thru the exhaust always turns heads.I have never had a cop give me any trouble when I do that and sometimes I get a thumbs up from them. No need to live in fear of the traffic ticket....
LOL..

I do that too.. love it when I down shift to 2nd at 35mph and hear the VROOOM... then again into 1st at 20mph.... VROOOM.. pop-pop-pop....

I did feel like my car was more "peppy" after the muffler delete.. But that could be just my "butt dyno" being psychosomatic.
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Old 08-21-2012, 03:40 PM   #34
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Originally Posted by Brutal SS View Post
Here is a before and after muffler delete vid I did on my otherwise completely stock LS3. A fairly good contrast, and includes a drive-by after the delete as well. I hope this helps as a reference, even though mine is LS3.


The drive-by was done at 44 mph right?!!?!?!? good video!
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Old 08-21-2012, 05:46 PM   #35
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Doing this as we speak what is amf by the way ?
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Old 08-21-2012, 08:58 PM   #36
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Doing this as we speak what is amf by the way ?
Active Fuel Management- It shuts down the fuel to 4 cyclinders during low load to increase fuel economy.
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Old 08-21-2012, 09:33 PM   #37
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Two words. Back pressure.

Don't do this if you drag race.
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Old 08-21-2012, 09:35 PM   #38
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Two words. Back pressure.

Don't do this if you drag race.
worst case of misinformation in the automotive world today....
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Old 08-21-2012, 09:43 PM   #39
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Originally Posted by VVXXXVV View Post
Doing this as we speak what is amf by the way ?
You don't have AFM. Its only on the L99 Automatics.
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Old 08-21-2012, 10:01 PM   #40
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Oh.

Well I'm telling you for experience you'll lose time if you drag race.
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Old 08-21-2012, 10:02 PM   #41
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Oh.

Well I'm telling you for experience you'll lose time if you drag race.
wrong again.
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Old 08-21-2012, 10:06 PM   #42
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wrong again.
Typical
I don't care If you think you are all knowing. I'm telling facts from personal experience.
Unless you are there you don't know. Don't care what your books are telling you.

Yes I'm aware you have experience. Do I care? No. Stating facts from personal experience.
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