Observation of NPP Exhaust / Crimped Exhaust pipes

BrandX · 11-26-2015, 08:41 PM

Was checking out my new 2016 at the dealer and gave it a good inspection. Upon looking underneath at the Dual Mode set-up, I noticed the pipes immediately ahead of the muffler are about halfway crushed. The other NPP equipped SS on the lot had the same issue.

Can someone with the NPP check out their pipes and see if they are the same.

I doubt it hurts performance, but I just don't see why Chevy had to "clearance" the pipes that much.

Tr6 · 11-26-2015, 09:46 PM

Nice catch, mine are not "crushed" but definitely pinched right before going into the muffles. Like a round oil wrench squeezed them about quarter of an inch.

SS 1LE · 11-26-2015, 09:46 PM

It's done for cancelation of certain tones. My Mustangs resonators had the same sort of thing. Everyone thinks their dents when they see them, but they are put there for a reason. My bet is same thing goes for the NPP...

ZBunny · 12-13-2015, 02:04 PM

Our is crushed too. Looks like an easy fix. Bet another type of performance exhaust with straight pipes would add 10 RWHP. A kid pointed out that he thought this exhaust was as noisy as the SLP Loud Mouth on our 2002 Z28. LOL.

JDP Sales · 12-13-2015, 04:13 PM

Most certainly not an oversight on GMs part. I'm confident there is good reason for it. Catback that adds 10 RWHP over npp is a stretch.

All the best,

Jared Royce
888.308.6007

Classic Man · 12-18-2015, 08:00 AM

Agreed. Others see this issue?

SS 1LE · 12-18-2015, 08:16 AM

Quote:

Originally Posted by Classic Man

Agreed. Others see this issue?

What issue? They are there for a reason as I already stated in post #3.

vtirocz · 12-30-2015, 05:13 PM

Quote:

Originally Posted by SUMMIT WHITE SS

It's done for cancelation of certain tones. My Mustangs resonators had the same sort of thing. Everyone thinks their dents when they see them, but they are put there for a reason. My bet is same thing goes for the NPP...

Did you actually see the crushed section beneath the rear suspension on each side? Their reason for doing this has to be for clearance. He's not talking about the reduced diameter piping that enters the muffler. Look about a foot or so forward of that, the piping is definitely crushed (the entire top of piping is crushed down to the centerline) and appears to reduce the cross sectional area by about a half.

This is an even worse crush than the over axle piping on my factory SLP dual/dual exhaust on my 2000 camaro.

vtirocz · 12-30-2015, 05:14 PM

Quote:

Originally Posted by Tr6

Nice catch, mine are not "crushed" but definitely pinched right before going into the muffles. Like a round oil wrench squeezed them about quarter of an inch.

Check directly under the axle, it's definitely crushed significantly. That pinched part entering the muffler is nothing in comparison.

BradfordCamaro · 12-30-2015, 05:23 PM

Why are people using the terms "Issue" and "crushed"

It is a design featured engineered by highly paid GM employees that know a whole lot more about the exhuast requirements than internet experts.

Get over it.

jimmypop13 · 12-30-2015, 07:37 PM

Quote:

Originally Posted by BradfordCamaro

Why are people using the terms "Issue" and "crushed"

It is a design featured engineered by highly paid GM employees that know a whole lot more about the exhuast requirements than internet experts.

Get over it.

Yeah considering it seems to be making more power to the ground than the corvette which doesn't have crushed sections, I'd say it's not hurting flow.

vtirocz · 12-30-2015, 08:16 PM

Quote:

Originally Posted by BradfordCamaro

Why are people using the terms "Issue" and "crushed"

It is a design featured engineered by highly paid GM employees that know a whole lot more about the exhuast requirements than internet experts.

Get over it.

Relax! I'd say just an interesting observation, not an "issue". It's a designed in crushed section of the piping - not sure how else you could describe it. i'm sure the engineers working on this looked at trade-offs (ground clearance, clearance to suspension, cost, flow restriction, etc) and this was found to be the best solution. When I had a close look at the exhaust today, I was just surprised at the level of cross sectional area reduction with this in place.

Also, in case anyone is interested, it looks like Faurecia makes the muffler. They make a lot of OEM exhaust systems and their name is stamped into the bottom of the muffler (dual mode SS that I was looking at).

SpeedIsLife · 12-31-2015, 09:06 AM

Quote:

Originally Posted by BradfordCamaro

Why are people using the terms "Issue" and "crushed"

It is a design featured engineered by highly paid GM employees that know a whole lot more about the exhuast requirements than internet experts.

Get over it.

I expect you won't be modifying your car then, yes?

100% stock for life? Because that's how the highly paid GM employees designed it...must be the best of the best as it is.

Sledgehammer70 · 01-11-2016, 05:38 PM

So, any theory on why this is? Having my car on a lift and on the ground, it looks like there is plenty of clearance. Could this be damping the sound and or performance?

I am working with my brother in-law to see how we can add an H-Pipe and have a better flow on this section of pipes for the NPP system.

11-26-2015, 08:41 PM	#1
BrandX Camaro Again? Drives: 2016 Camaro SS Join Date: Oct 2009 Location: Tampa Bay, Florida Posts: 215	Observation of NPP Exhaust / Crimped Exhaust pipes Was checking out my new 2016 at the dealer and gave it a good inspection. Upon looking underneath at the Dual Mode set-up, I noticed the pipes immediately ahead of the muffler are about halfway crushed. The other NPP equipped SS on the lot had the same issue. Can someone with the NPP check out their pipes and see if they are the same. I doubt it hurts performance, but I just don't see why Chevy had to "clearance" the pipes that much. __________________ 2SS, NGM, NPP, MRC, 6M, NAV, Blk Bowties, Split Spoke Gray wheels

11-26-2015, 09:46 PM	#2
Tr6 The Dogfather Drives: #1 off the line for a customer. '16 Join Date: Oct 2015 Location: Andover, KS Posts: 2,621	Nice catch, mine are not "crushed" but definitely pinched right before going into the muffles. Like a round oil wrench squeezed them about quarter of an inch. __________________ 2SS, Garnet Red with Adrenalin red, NPP, MRC M6 coupe #33 off the line #1 order for Customer. Build thread HERE! Story of my delivery HERE!

12-13-2015, 02:04 PM	#4
ZBunny Drives: 2016 1SS in Hyper Blue Metallic Join Date: Aug 2015 Location: Outside Chicago Posts: 16	Our is crushed too. Looks like an easy fix. Bet another type of performance exhaust with straight pipes would add 10 RWHP. A kid pointed out that he thought this exhaust was as noisy as the SLP Loud Mouth on our 2002 Z28. LOL. __________________ Currently Driving: 1SS Hyper Blue Metallic,Manual 6 speed,NPP, Split Spoke Bright Silver Painted Aluminum Wheels. Past rides: '02 Z28 Black Manual w/Loudmouth (his) '02 Z28 Metallic Navy Auto w/T-tops (mine) '98 Z28 Metallic Purple Auto w/ T-tops (mine) '98 Z28 Black Manual w/T-tops (his) '98 SS Black Manual (his) '94 Z28 Teal Auto w/T-tops (ours) '91 Camaro RS Red Auto(ours)

12-30-2015, 05:23 PM	#10
BradfordCamaro SABIO Drives: 2016 CAMARO 1SS Join Date: Jul 2015 Location: Bradford, ON Posts: 5,013	Why are people using the terms "Issue" and "crushed" It is a design featured engineered by highly paid GM employees that know a whole lot more about the exhuast requirements than internet experts. Get over it. __________________

01-11-2016, 05:38 PM	#14
Sledgehammer70 Lethal Camaro Drives: 16 2SS, 71 Std, Suburban RTS Join Date: Jun 2013 Location: Temecula, CA Posts: 3,855 View My Garage	2016 Camaro SS NPP Exhaust Pipes Crimped @ Rear Axel So, any theory on why this is? Having my car on a lift and on the ground, it looks like there is plenty of clearance. Could this be damping the sound and or performance? I am working with my brother in-law to see how we can add an H-Pipe and have a better flow on this section of pipes for the NPP system. Attached Images __________________ Thanks My Build Thread \| Lethal Garage YouTube \| Lethal Camaro IG \|

11-26-2015, 09:46 PM	#3
SS 1LE マスタング = 遅い Drives: 2017 Chevrolet Camaro SS 1LE Join Date: Aug 2015 Location: Florida Posts: 7,061	It's done for cancelation of certain tones. My Mustangs resonators had the same sort of thing. Everyone thinks their dents when they see them, but they are put there for a reason. My bet is same thing goes for the NPP...

12-13-2015, 04:13 PM	#5
JDP Sales Drives: Chevys at the limit Join Date: Nov 2010 Location: SLC, UT Posts: 9,621	Most certainly not an oversight on GMs part. I'm confident there is good reason for it. Catback that adds 10 RWHP over npp is a stretch. All the best, Jared Royce 888.308.6007

12-18-2015, 08:00 AM	#6
Classic Man Drives: 2016 Mosaic Black Camaro 2SS Join Date: Nov 2015 Location: Virginia Posts: 48	Agreed. Others see this issue?

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