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Old Aug 8, 2015 | 04:48 PM
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Default Stupid question....

Hello all,

Dumb question here. I'm looking at used 2014 vettes, but i'm not a traditional "car guy," so not always sure of what i'm looking at, so figured i'd try here since i've been a long time lurker.

I found a used vette that a nice little old lady has babied, but she doesn't know all the options she has in it, (it's a 3LT per the vin.) The exhaust has a valve in the outter left and right exhaust pipes, but not the center ones. Does that mean it is the AFM or NPP exhaust set up? I can't find anything through the search bar to answer this, and google hasn't helped me much either. Any advice or way to look up if this is the performance exhaust or not would be great.

Thanks!
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Old Aug 8, 2015 | 04:55 PM
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NPP has the valves in the exhaust tips, after the mufflers. The AFM valves are mounted before the mufflers.
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Old Aug 8, 2015 | 04:56 PM
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Originally Posted by William Voorcorum
Hello all,

Dumb question here. I'm looking at used 2014 vettes, but i'm not a traditional "car guy," so not always sure of what i'm looking at, so figured i'd try here since i've been a long time lurker.

I found a used vette that a nice little old lady has babied, but she doesn't know all the options she has in it, (it's a 3LT per the vin.) The exhaust has a valve in the outter left and right exhaust pipes, but not the center ones. Does that mean it is the AFM or NPP exhaust set up? I can't find anything through the search bar to answer this, and google hasn't helped me much either. Any advice or way to look up if this is the performance exhaust or not would be great.

Thanks!
They will all have AFM valves but the ones at the back just in front of mufflers makes it the performance exhaust (NPP).
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Old Aug 8, 2015 | 04:56 PM
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Sounds like NPP. I would be looking for Z51. Take a look at the brake rotors. Vented = Z51.
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Old Aug 8, 2015 | 05:01 PM
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Originally Posted by William Voorcorum
Hello all,

Dumb question here. I'm looking at used 2014 vettes, but i'm not a traditional "car guy," so not always sure of what i'm looking at, so figured i'd try here since i've been a long time lurker.

I found a used vette that a nice little old lady has babied, but she doesn't know all the options she has in it, (it's a 3LT per the vin.) The exhaust has a valve in the outter left and right exhaust pipes, but not the center ones. Does that mean it is the AFM or NPP exhaust set up? I can't find anything through the search bar to answer this, and google hasn't helped me much either. Any advice or way to look up if this is the performance exhaust or not would be great.

Thanks!
Sounds like the "Little Old Lady From Pasadena!" Perhaps a "gear head" if she ordered NPP! Good question. First if it has NPP the outside diameter of the Stainless exhaust pipe is 4 inches. The non NPP is smaller (my NPP tip openings are 4 inches.)
The outer two pipes have buttlerflys you can see and two electrically operated valves that can be easily seen. All C7's have a pair of similar valves back before the mufflers that restrict the exhaust when in 4 cylinder mode. Therefore the NPP exhaust has 4 valves. Easiest is to measure the width of the stainless outer diameter. It fills the opening where the none NPP does not. Hope that helps.

Last edited by JerryU; Aug 8, 2015 at 05:05 PM.
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Old Aug 8, 2015 | 05:10 PM
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Or you could look at the RPO tag (snap a photo with your phone) and check for NPP.

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Old Aug 8, 2015 | 05:11 PM
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Originally Posted by juanvaldez
Sounds like NPP. I would be looking for Z51. Take a look at the brake rotors. Vented = Z51.
They're all vented. SLOTTED = Z51.
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Old Aug 8, 2015 | 05:11 PM
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You guys don't mess around here haha. The woman was either a gear head or her son told her what to order (the current 2nd owner.) I'm guessing the latter, as the lady is 87 and only had it titled to her for 4 months before giving it to her son. Anyway, it looks like it's got the NPP from what i've gathered from you all. It isn't a z-51, just a 3LT. Thanks for the help!
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Old Aug 8, 2015 | 07:39 PM
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Originally Posted by William Voorcorum
You guys don't mess around here haha. The woman was either a gear head or her son told her what to order (the current 2nd owner.) I'm guessing the latter, as the lady is 87 and only had it titled to her for 4 months before giving it to her son. Anyway, it looks like it's got the NPP from what i've gathered from you all. It isn't a z-51, just a 3LT. Thanks for the help!
Look at the wheels. In '14 all Z51's came with the split spoke wheels.
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Old Aug 8, 2015 | 07:46 PM
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Originally Posted by gbjerke
Look at the wheels. In '14 all Z51's came with the split spoke wheels.
No they didn't.

Last edited by owc6; Aug 8, 2015 at 09:07 PM.
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Old Aug 8, 2015 | 07:48 PM
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Or owners bought Z51 wheels.
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Old Aug 8, 2015 | 08:58 PM
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Originally Posted by gbjerke
Look at the wheels. In '14 all Z51's came with the split spoke wheels.
My premier edition Z51 convertible doesn't have split spoke wheels.
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Old Aug 8, 2015 | 09:06 PM
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Originally Posted by StFarmer
My premier edition Z51 convertible doesn't have split spoke wheels.


There are at least 1,050 2014 Z51s without split-spoke wheels.


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Old Aug 9, 2015 | 12:53 AM
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Originally Posted by RussM05
Or owners bought Z51 wheels.


I have a base 2014 and I purchased a set of black Z-51 wheels to replace my chrome base wheels because I like the look.

Slotted brakes are a standard on the Z-51. It's an easy way to tell the base from a Z-51.



If it's a good deal, buy it and enjoy!!!
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Old Aug 9, 2015 | 05:56 AM
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Originally Posted by juanvaldez
Sounds like NPP. I would be looking for Z51. Take a look at the brake rotors. Vented = Z51.

And a whole bunch of us didn't buy, nor do we want, Z51.

Good luck in your search, William Voorcorum!
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Old Aug 9, 2015 | 10:01 AM
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That nice little old lady probably paid MSRP and her son probably is figuring depreciation off MSRP. The new ones are discounted up to 10% off MSRP so figure that into your offer. As a general rule I would subtract 15% from MSRP for a very low mileage 2014 and go from there.
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Old Aug 9, 2015 | 10:06 AM
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NPP has flared exhaust tips........regular is a straight pipe.
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Old Aug 9, 2015 | 11:37 AM
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You can also decode the vin via Chevy customer service. They can tell you all the options on the car.
You might get a member vendor ( rhyme not intended ) to decode it for you.
Post the mileage and you will get a fairly accurate value from members, will give you some leverage when dickering.
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Old Aug 9, 2015 | 08:06 PM
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Originally Posted by owc6
No they didn't.
Apparently my bad but when I was searching for my '14 Z51, the wheel choices were the standard split spoke, or black or chrome split spoke. None other wheel choices which was fine with me as I am a fan of split spoke and have never seen a Z51 without them.
Guess I am wrong???
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Old Aug 9, 2015 | 09:11 PM
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All's cool, as I like the split spoke wheels.

I wish my ''09 Z06 had the split spoke wheels of the early years. I hated the spyder wheels.
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