NPP vs Stock Exhaust Mod, which is louder?

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05-11-2013, 09:32 PM

Scott in IN

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NPP vs Stock Exhaust Mod, which is louder?

I did the stock exhaust mod on my 06 vert and it sounds much better. However, I'm thinking I'd like a 'little' more sound so how much louder is the NPP in the open position?

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05-11-2013, 09:45 PM

speedraider

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my npp exhaust is loud as hell with catless headers when open

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05-11-2013, 10:05 PM

saplumr

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Quote:

Originally Posted by speedraider

my npp exhaust is loud as hell with catless headers when open

Any exhaust with the offroad is loud! Originally I had the offroad with Corsa Sport (of all semi quiet systems) and it ratteled the glass!

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05-11-2013, 10:12 PM

bigswiss89

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my NPP with 7/8 headers and HFC xpipe sounds beastly

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05-11-2013, 10:36 PM

Scott in IN

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I've got cats and the stock exhaust manifolds....

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05-11-2013, 10:51 PM

91redragtop

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I have the NPP with the mild to wild switch and keep mine open all of the time and it sounds wicked when you get on it pretty hard!!

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05-12-2013, 02:02 PM

DvX

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stock exhaust mod?

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05-12-2013, 02:07 PM

Rathmullan

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Quote:

Originally Posted by Scott in IN

I did the stock exhaust mod on my 06 vert and it sounds much better. However, I'm thinking I'd like a 'little' more sound so how much louder is the NPP in the open position?

It is noticeably louder without being obnoxious.

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05-12-2013, 02:39 PM

j_digi454

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Quote:

Originally Posted by speedraider

my npp exhaust is loud as hell with catless headers when open

Same here with my Hi-Flow cats.

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05-12-2013, 02:57 PM

#10

Vette Nut

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Quote:

Originally Posted by Scott in IN

I did the stock exhaust mod on my 06 vert and it sounds much better. However, I'm thinking I'd like a 'little' more sound so how much louder is the NPP in the open position?

If you are around Fort Wayne Come listen to my NPP otherwise find someone in your area who has them.

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05-12-2013, 03:27 PM

#11

FloydSummerOf68

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I had Z06 mufflers with catless longtubes and it wasn't too loud at all. When I did the muffler mod (making them the same as NPP) it was absurdly loud when open.