Npp vs bi-mode

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Feb 18, 2012 | 11:48 PM

playtoy

Thread Starter

Burning Brakes

Joined: Aug 2008

Posts: 855

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From: Katy/Houston Texas

Npp vs bi-mode

What's the difference in the two of them. I am thinking about getting rid of my corsa and get one or the other and want to know which one I need.

Feb 19, 2012 | 12:37 AM

Vette_DD

Team Owner

Joined: May 2004

Posts: 82,175

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From: McKinney TX

St. Jude Donor '21-'22-'23-'24

I think what you're calling bi-mode exhaust is what GM actually calls dual-mode exhaust. NPP is just the RPO for it. Here's what the 2008 order guide says about NPP.

Quote:

NEW! Exhaust, dual-mode, performance,
increases horsepower, adds 6 hp, aggressive
exhaust sound

Feb 19, 2012 | 01:19 AM

ashanson

Instructor

Joined: Jan 2011

Posts: 214

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From: Des Moines, Iowa

Bi-mode comes on the z06 and has 3" pipes. NPP is an option on the non z06 cars and has 2.5" piping. Other than that they basically operate the same. You will have to get a control box for the vacuum actuators if you car didn't come with one from the factory.

Feb 19, 2012 | 01:54 AM

playtoy

Thread Starter

Burning Brakes

Joined: Aug 2008

Posts: 855

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From: Katy/Houston Texas

Quote:

Originally Posted by ashanson

Thanks that's exactly what I needed to know.

Feb 19, 2012 | 02:35 AM

TRBOKEV

Racer

Joined: Feb 2011

Posts: 468

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From: Phillips Ranch California

Get a full z06 exhaust and call it a day!

I have this and im thinking of something more agressive allready though.

Feb 19, 2012 | 10:38 AM

RLSebring

Supporting Vendor

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From: Pensacola Florida GO GATORS!!! www.rlsebring.com www.c6c7vette.com

St. Jude Donor '17

The tone of the two exhaust are slightly different as well. I started witht he stock muffler mod and that led to hthe Z06 muff then modded those then led to the NPP which I still have and love.

If you get a chance to listen to both and make the decision. It's nice to be a little loud most of the time then hit the button for quite when needed or wanted...

Feb 19, 2012 | 10:42 AM

johnodrake

Moderator

Joined: Dec 2002

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From: Lakewood Ranch, FL

Quote:

Originally Posted by TRBOKEV

Get a full z06 exhaust and call it a day!

I have this and im thinking of something more agressive allready though.

Change the axel back to 2011+ Z06/ZR1. You will love the more agressive tone!

Feb 19, 2012 | 04:16 PM

HOXXOH

Race Director

Joined: Sep 2007

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From: Peoria/Phoenix AZ

C6 of Year Finalist (performance mods) 2019

Quote:

Originally Posted by RLSebring

If you get a chance to listen to both and make the decision. It's nice to be a little loud most of the time then hit the button for quite when needed or wanted...

The closed mode is almost, but not quite as quiet as the stock mufflers.