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Just got my sticker and build sheet from the museum and low and behold my Z51 has no NPP list ed anywhere! No I'm confused cause I was under the illusion all Z51s got the NPP as standard equiment, no? Added sticker and build sheet.
Last edited by tmbozoki@gmail.com; Jul 4, 2025 at 07:17 AM.
Reason: add pictures
as mentioned already, the NPP was not standard on the 2014 so it would show on the window sticker. If you have the 2014 model year, pull the carpet back in the rear area and look at the sticker to see if it is listed there. If you have the 2015 or newer, the NPP was part of the Z51 package and I am not 100% sure, but it may not listed as it is already part of that package.
as mentioned already, the NPP was not standard on the 2014 so it would show on the window sticker. If you have the 2014 model year, pull the carpet back in the rear area and look at the sticker to see if it is listed there. If you have the 2015 or newer, the NPP was part of the Z51 package and I am not 100% sure, but it may not listed as it is already part of that package.
Correct, just looked at my sheet, it's not listed, but I have it.
Yep, my 2014 Z51 did not come standard with NPP.
While I don't have a window sticker from the museum; I've simply been too lazy to order one, my Monroney label shows there was an additional charge of $1,195 for NPP.
I have the NPP on my 2014. I like it open all the time. You don't have to worry, if and when, they are closed. I installed the cat less X-pipe and it still isn't that loud.
On a positive note, if you'd ever want an aftermarket axle-back exhaust the versions without NPP are much less expensive and fairly easy to find used. I sometimes wish I didn't have NPP because I already pulled the fuse to keep the valves open and I'd like a bit more of an aggressive exhaust note I could get with aftermarket.
What happened?
