OEM ZL1 Catback on SS - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Egghaus · 06-16-2024, 09:32 AM

I believe this has been covered before but I just wanted to check again. I have been looking at exhaust options for my 2011 SS, but to me they are all pretty expensive considering there is little to no HP benefit. I found someone locally selling the OEM NPP catback from a 2013 ZL1, from what I've read this should bolt right up to my SS as long as I get the 2013 1LE diffuser. I know the valves will be open all the time, but I've watched some clips and it sounds great to me with factory manifolds and cats. It also looks like this system is a bit lighter since there are no resonators and the mufflers are smaller. I prefer the look of the quad tips as well. Am I missing anything?

CamaroCracka · 06-16-2024, 04:49 PM

I have never installed an NPP on an early 5th gen, but I just picked one up and I see no reason it would not bolt up. I sold the mufflers to pay for the whole deal so now I have a spare exhaust for when I need it.

olblue75 · 06-16-2024, 09:56 PM

They should bolt up with no issues since it’s the same system on the 1LE and the 1LE is a SS. You can make your own control for the valves there are threads on it.
Currently running a full Z28 system from my HF Cats back, the Z system is 2 3/4 bs the SS/ZL 2 1/2 pipes. Sounds really good.

vinman · 06-17-2024, 01:52 PM

Just an FYI, not all 1LE's have the NPP diffuser, NPP was an option

1JEWLDSSRS · 07-30-2024, 03:21 PM

Quote:

Originally Posted by vinman

Just an FYI, not all 1LE's have the NPP diffuser, NPP was an option

BUT, all the 1LE's did have the quad tip diffuser... I believe. Weather it had the NPP or not.. They didn't come with single tip exhaust.

Ashen L99 · 08-01-2024, 04:23 AM

Quote:

Originally Posted by 1JEWLDSSRS

BUT, all the 1LE's did have the quad tip diffuser... I believe. Weather it had the NPP or not.. They didn't come with single tip exhaust.

Actually, they did come with the single tip diffuser if they were not optioned with npp. I sat in one at my local dealership back in 2015 that was not optioned with it. But few and far between are the 1les that did not have npp, every one I have seen in the wild has had the box checked for it.

Trawz · 08-01-2024, 10:35 AM

Quote:

Originally Posted by Ashen L99

Actually, they did come with the single tip diffuser if they were not optioned with npp. I sat in one at my local dealership back in 2015 that was not optioned with it. But few and far between are the 1les that did not have npp, every one I have seen in the wild has had the box checked for it.

I can back that up. My 1LE is a dual-tip one. It came with a dual tip diffuser.
The only option the previous owner of my 1LE checked was the RS package.

1JEWLDSSRS · 08-01-2024, 07:58 PM

Quote:

Originally Posted by Ashen L99

Actually, they did come with the single tip diffuser if they were not optioned with npp. I sat in one at my local dealership back in 2015 that was not optioned with it. But few and far between are the 1les that did not have npp, every one I have seen in the wild has had the box checked for it.

Well I stand corrected!! I didn't know that. Out of all the info I do have, THAT one slipped by me. I;ve never seen one. Thanks.

vinman · 08-02-2024, 03:59 PM

Quote:

Originally Posted by Trawz

I can back that up. My 1LE is a dual-tip one. It came with a dual tip diffuser.
The only option the previous owner of my 1LE checked was the RS package.

He didn't get NPP for free, it was an $895 option, I ordered mine and I did the box checking myself, and BeckyD put the order in for me

Trawz · 08-03-2024, 11:25 PM

Quote:

Originally Posted by vinman

He didn't get NPP for free, it was an $895 option, I ordered mine and I did the box checking myself, and BeckyD put the order in for me

I don't have the NPP. Because the previous owner did not option it. That is what I was referring to.

06-16-2024, 09:32 AM	#1
Egghaus Drives: '11 2SS/RS LS3, '11 Silverado 6.2L Join Date: Jul 2019 Location: ON, Canada Posts: 7	OEM ZL1 Catback on SS I believe this has been covered before but I just wanted to check again. I have been looking at exhaust options for my 2011 SS, but to me they are all pretty expensive considering there is little to no HP benefit. I found someone locally selling the OEM NPP catback from a 2013 ZL1, from what I've read this should bolt right up to my SS as long as I get the 2013 1LE diffuser. I know the valves will be open all the time, but I've watched some clips and it sounds great to me with factory manifolds and cats. It also looks like this system is a bit lighter since there are no resonators and the mufflers are smaller. I prefer the look of the quad tips as well. Am I missing anything?

06-16-2024, 04:49 PM	#2
CamaroCracka Drives: 2010 Turbo LS3 Join Date: Dec 2009 Location: Palm Bay, FL Posts: 2,852	I have never installed an NPP on an early 5th gen, but I just picked one up and I see no reason it would not bolt up. I sold the mufflers to pay for the whole deal so now I have a spare exhaust for when I need it. __________________ 2010 SS - Kind of an On3 kit, CTR 78/80, CompCam 239/251 620/632 122+4, E85, Z28 suspension and ZL1 diff with Outlaw axles. Gen6 ZL1/1LE brakes. 2011 Vert - 416/w 230/236 .612/.602 115lsa, 1LE suspension w/32mm rear bar. Z28 diff. ZL1 brakes.

06-16-2024, 09:56 PM	#3
olblue75 Drives: 2010 2SS/RS Join Date: Dec 2009 Location: Clarksville Tennesse. Posts: 6,091	Exhaust system They should bolt up with no issues since it’s the same system on the 1LE and the 1LE is a SS. You can make your own control for the valves there are threads on it. Currently running a full Z28 system from my HF Cats back, the Z system is 2 3/4 bs the SS/ZL 2 1/2 pipes. Sounds really good. __________________ Orange Krush II 1LE Front sway bar, Splitter, shocks and struts, Z28 dual mode mufflers, Intake, UCA Bushings, and Toresen 3.91 Diff. 1 piece DSS Drive Shaft, ZL1/C7 Calipers, and 32mm JPSS Rear Bar. ASC race spec splitter and wicker. 6th Gen M017 Wheels. Stainless Works 1 7/8 LTs. DSE and PAFDT Suspension components.

06-17-2024, 01:52 PM	#4
vinman The BBOMG fill-in husband Drives: 2015 2SS/RS 1LE AKA V1LE Join Date: Aug 2010 Location: Elmira, NY Posts: 4,465 View My Garage	Just an FYI, not all 1LE's have the NPP diffuser, NPP was an option __________________ UPSTATE C5 MEMBER