Dual Mode Exhaust Deleted For 2018 ZL1?

csurules · 11-12-2017, 05:38 PM

Hey guys, I am about to pull the trigger on factory order for a 2018 ZL1 Convertible. When the salesman sent over the full order sheet for me to confirm the options and pricing, I saw no NPP option code for the Dual Performance Exhaust. I know this was there on the 2017s for sure as evident by some window stickers online (at least for the ZL1 coupe, unsure if 2017 convertibles came with NPP?).

In searching through the Chevy.com build your own, it also doesn't show up as 2018 standard equipment (nor optional), and mentions nothing at all about the exhaust in the Mechanical Summary section.

Can anyone with a 2018 non-1LE coupe or convertible confirm that NPP is gone?

Also, I'm in California so am hoping the YF5 option for California emissions isn't causing this NPP option to disappear.

Thanks in advance!

Harry76 · 11-12-2017, 05:59 PM

I think it is standard, It was included in my 18 ZL1.

csurules · 11-12-2017, 06:18 PM

Thanks for the quick reply - hoping this is just a miss on Chevy's end - have attached pics showing the 2017 vs 2018 build summaries to show what I am talking about

17CamaroZL1 · 11-12-2017, 07:22 PM

The dual mode exhaust stating it uses vacuum pumps sounds like a 5th gen features list. I know my car has electric motorized valves and would think the convertible would have the same.

RollaMo · 11-12-2017, 09:01 PM

On the Chevy Site, under "Build Your Own"
It lists dual mode exhaust as standard equipment on the ZL1

Eric SS · 11-12-2017, 09:35 PM

It’s standard. No need to worry.

csurules · 11-13-2017, 08:26 PM

Thanks guys - good catch on the wording on "vacuum pump" - now makes me pretty sure Chevy screwed it up on the 2017 description and corrected it on the 2018.

Gunkk · 11-13-2017, 08:43 PM

NPP is standard, and electrically actuated.

*Mr. Wyndham* · 11-13-2017, 09:52 PM

It's a standard feature of the car. If they left it off any ordering/build literature, it's probably just a typo.

Pwiegand · 11-14-2017, 05:18 PM

I have a 2018 coupe and it definitely has dual mode exhaust.

Can'tHave2MuchHP · 11-14-2017, 05:35 PM

Technically, isn't it 5 mode exhaust? "Penta-mode" lol.

cmitchell17 · 11-14-2017, 05:53 PM

Whats up the with vaccum statement? I thought the NPP was controlled by a motor that sends a PWM control?

Also, how is the DOD/AFM control done? Is'nt it just vaccum controlled? I've never actually seen it, and I'm just wondering how it quiets everything down so much in V4?

*Mr. Wyndham* · 11-15-2017, 09:05 AM

Quote:

Originally Posted by cmitchell17

Whats up the with vaccum statement? I thought the NPP was controlled by a motor that sends a PWM control?

Also, how is the DOD/AFM control done? Is'nt it just vaccum controlled? I've never actually seen it, and I'm just wondering how it quiets everything down so much in V4?

I don't know about AFM...but the last-generation of NPP was vacuum controlled. Could be a legacy typo that was carried over.

davidcroft · 11-15-2017, 12:46 PM

Quote:

Originally Posted by Pwiegand

I have a 2018 coupe and it definitely has dual mode exhaust.

Mine does too! 5th Gens were vacuum actuated, 6th gens are electronically controlled

11-12-2017, 05:38 PM	#1
csurules Drives: 2000 Camaro SS, 2018 ZL1 M6 Join Date: Sep 2017 Location: Oregon Posts: 18	Dual Mode Exhaust Deleted For 2018 ZL1? Hey guys, I am about to pull the trigger on factory order for a 2018 ZL1 Convertible. When the salesman sent over the full order sheet for me to confirm the options and pricing, I saw no NPP option code for the Dual Performance Exhaust. I know this was there on the 2017s for sure as evident by some window stickers online (at least for the ZL1 coupe, unsure if 2017 convertibles came with NPP?). In searching through the Chevy.com build your own, it also doesn't show up as 2018 standard equipment (nor optional), and mentions nothing at all about the exhaust in the Mechanical Summary section. Can anyone with a 2018 non-1LE coupe or convertible confirm that NPP is gone? Also, I'm in California so am hoping the YF5 option for California emissions isn't causing this NPP option to disappear. Thanks in advance!

11-12-2017, 06:18 PM	#3
csurules Drives: 2000 Camaro SS, 2018 ZL1 M6 Join Date: Sep 2017 Location: Oregon Posts: 18	Thanks for the quick reply - hoping this is just a miss on Chevy's end - have attached pics showing the 2017 vs 2018 build summaries to show what I am talking about Attached Images

11-12-2017, 07:22 PM	#4
17CamaroZL1 Life's Short, Live Fast! Drives: 2017 Hyper Blue A10 ZL1 Join Date: Nov 2016 Location: London, KY Posts: 2,015	The dual mode exhaust stating it uses vacuum pumps sounds like a 5th gen features list. I know my car has electric motorized valves and would think the convertible would have the same. __________________ Life's Short, Live Fast! https://youtu.be/rTUv2p4T7OA 10.94 at 128 mph, 11.13 at 127mph 870 DA, https://youtu.be/e_X_LcpFp50 11.19 at 127mph 1100 DA, https://youtu.be/OXQiCQdQuH4 11.40 at 125mph 1800 DA https://youtu.be/uWba1qs8M6Q 11.52 at 123mph 3500 DA TZQPHG '17 ZL1 HBM\|A10\|Nav\|PDR\|CFW Hood\|ZL1 Mats 12/26/2016 Ordered! 2/8/2017 Built!! 3/2/2017 Brought Home!!!

11-12-2017, 09:01 PM	#5
RollaMo Drives: 2017 2SS Join Date: Mar 2012 Location: Rolla, MO Posts: 1,106	On the Chevy Site, under "Build Your Own" It lists dual mode exhaust as standard equipment on the ZL1 Attached Images __________________ 1996 Corvette - LT4 2017 Camaro 2SS 2019 GMC Sierra 2500 HD 2015 Harley Davidson Ultra Limited

11-13-2017, 08:43 PM	#8
Gunkk Thank you Al Oppenheiser! Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017 Location: Sarasota, FL Posts: 4,978 View My Garage	one more whack for the horse... NPP is standard, and electrically actuated.

11-12-2017, 05:59 PM	#2
Harry76 Drives: 2018 ZL1 A10 Nightfall Gray Join Date: Apr 2016 Location: Indiana Posts: 104	I think it is standard, It was included in my 18 ZL1.

11-12-2017, 09:35 PM	#6
Eric SS #becauseracecar Drives: 2016 SS Sedan, 2016 Camaro SS Join Date: May 2015 Location: Phoenix Posts: 2,959	It’s standard. No need to worry.

11-13-2017, 08:26 PM	#7
csurules Drives: 2000 Camaro SS, 2018 ZL1 M6 Join Date: Sep 2017 Location: Oregon Posts: 18	Thanks guys - good catch on the wording on "vacuum pump" - now makes me pretty sure Chevy screwed it up on the 2017 description and corrected it on the 2018.

11-13-2017, 09:52 PM	#9
Mr. Wyndham I used to be Dragoneye... Drives: 2018 ZL1 1LE Join Date: Jan 2007 Location: Buffalo, NY Posts: 31,876 View My Garage	It's a standard feature of the car. If they left it off any ordering/build literature, it's probably just a typo. __________________ *"Keep the faith."* - Fbodfather

11-14-2017, 05:18 PM	#10
Pwiegand Drives: 2018 ZL1 in sweet hyper blue Join Date: Oct 2017 Location: North Carolina Posts: 61	I have a 2018 coupe and it definitely has dual mode exhaust.

11-14-2017, 05:35 PM	#11
Can'tHave2MuchHP Drives: Fast Join Date: Mar 2015 Location: Michigan Posts: 3,696	Technically, isn't it 5 mode exhaust? "Penta-mode" lol.

11-14-2017, 05:53 PM	#12
cmitchell17 Drives: 17 2SS, 8L90, Cam, Heads, E85 Join Date: Dec 2016 Location: US Posts: 1,204	Whats up the with vaccum statement? I thought the NPP was controlled by a motor that sends a PWM control? Also, how is the DOD/AFM control done? Is'nt it just vaccum controlled? I've never actually seen it, and I'm just wondering how it quiets everything down so much in V4?

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