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Old 12-07-2018, 03:08 PM   #1
actor2120
 
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Drives: 2017 2SS Garnet Red Convertible
Join Date: Sep 2016
Location: Dallas, TX
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Question MBRP Axle-Back vs. NPP

Does anyone happen to know if the MBRP Axle-Back would be louder than stock NPP exhaust with the valves open?

I currently have NPP on my SS and am looking for an affordable louder sound, especially at startup and idle. I've been told the MBRP would be louder, but I don't understand why, because I thought that with the NPP wide open, I would be completely bypassing the muffler resulting in the loudest sound I can get without going catback.

Any help is appreciated!
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Old 12-07-2018, 03:20 PM   #2
drperry
 
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Some of the exhaust still goes through the muffler, it doesn't redirect all the flow out the open section.

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Old 12-08-2018, 03:25 PM   #3
retmil
 
Drives: 2022 Wild Cherry SS
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I had the MBRP axle back on my 17SS M6 for about 6 months and went back to the original NPP system due to the MBRP being so loud.
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Old 12-10-2018, 09:33 AM   #4
CompleteStreet
 
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MBRP is generally one of the louder exhausts for sure.
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