NPP exhaust option
Still looking to buy my first vette. Is there a way to tell if a c6 is equipped with the NPP exhaust option by VIN number?
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Not sure if you can tell by the VIN, but its easy to know when you are with the car
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I can't answer the VIN question, but you can also add NPP with an aftermarket kit and NPP style mufflers.
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Call your local Chevy dealer's parts department with the VIN and they can tell you. I hope this helps.
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just open the glove compartment and the option code NPP will be listed. A less intensive option would be to look for the venturi valve equipment out back
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Thanks!
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Originally Posted by raspyc6
(Post 1584317761)
just open the glove compartment and the option code NPP will be listed. A less intensive option would be to look for the venturi valve equipment out back
If your inner exhaust tips have the butterfly valve, the car has NPP. Whether it is factory optioned or owner added can only be told by the option sheet. |
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Look from this angle or have them send a picture. I thought I had a closer one, but you can see the valves on the two inside pipes if you look close.
Edit: Found one: http://i1202.photobucket.com/albums/...pse031231b.jpg |
Originally Posted by steveb601
(Post 1584317579)
I can't answer the VIN question, but you can also add NPP with an aftermarket kit and NPP style mufflers.
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Where did you find them?
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Originally Posted by Bcmayo
(Post 1584319973)
Where did you find them?
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I really like the NPP's
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Originally Posted by Bcmayo
(Post 1584319973)
Where did you find them?
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Heck you can tell if a vette has NPP and the fuse pulled from a distance. Just look at the inside pipes. If they're blacker than the outside ones, the car has NPP and the fuse is pulled (or M2W, or a 2 dollar switch like I have).
This is the classic "I've got the fuse pulled" look: http://www.corvettenews.com/images/FusePulled.jpg |
New '13 GS owner with the NPP option. Asking the question: Is the valve operated by solenoid or vacuum? In reading a few threads, it sounds like there is a way to open the valve all the time vs just above 3K RPM with heavy foot. Simple fix? Pulling the fuse doesn't send a code to the ECU?
So I gotta ask: Is the non-NPP (standard) exhaust like the NPP option in quiet mode? Or full open mode? If the latter, why do dealers order the extra cost NPP option only to have new owners immediately disable it? :crazy2: |
NPP valves on the mufflers are controlled by vacuum. My car didn't come with it but i used the aftermarket ones from B&B and routed the hoses, etc. The B&B sound similar to normal exhaust when the valves are closed and louder when open. Some people disable them and keep them loud all the time...others prefer to be able to control them when they want. Also by using one of the aftermarket switches you can control it manually vs. hitting the RPMs, etc.
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NPP... the best option I never knew I wanted. Absolutely love mine, although I would very highly recommend either a mild to wild controller or some sort of a hardwired switch so that you have total control of the NPP baffles.
They are very easy to spot if you look at an exhaust from behind. The solenoids above the mufflers stick out like a sore thumb. Some people cover them although I personally like them. |
Originally Posted by Bcmayo
(Post 1584317489)
Still looking to buy my first vette. Is there a way to tell if a c6 is equipped with the NPP exhaust option by VIN number?
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Originally Posted by Stavesacre21
(Post 1584326088)
NPP... the best option I never knew I wanted. Absolutely love mine, although I would very highly recommend either a mild to wild controller or some sort of a hardwired switch so that you have total control of the NPP baffles.
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Originally Posted by steveb601
(Post 1584325504)
NPP valves on the mufflers are controlled by vacuum. My car didn't come with it but i used the aftermarket ones from B&B and routed the hoses, etc. The B&B sound similar to normal exhaust when the valves are closed and louder when open. Some people disable them and keep them loud all the time...others prefer to be able to control them when they want. Also by using one of the aftermarket switches you can control it manually vs. hitting the RPMs, etc.
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