NPP vs Aftermarket Cat-back

[SS Performance]

If you are doing the work yourself you can always take it in steps.

Do the LT's

Then cat delete

Then x pipe

And last mufflers if you want.

I love my NPP!

[TorchedLSX]

Originally Posted by Ashen2SS

https://youtu.be/sQsgVe-ykhI

Are the valves closed on this or did you pull the fuse?

[TorchedLSX]

Thanks for everyones input. Sounds like I will be going with LT's and Xpipe with a controller. Not sure if I want to go cat-less or not though. I love the sound of no cats, but the wife hates the gas smell lol

[KW Baraka]

Originally Posted by TorchedLSX

...….my question is how does the NPP rank for flow vs an aftermarket cat-back?.....

If the aftermarkets flow better, it ain't by much at all. GM's exhausts are pretty darn good.

Originally Posted by TorchedLSX

...….Also, is there any benefit changing any part of this exhaust with the exception of going to Long Tubes.....

Go with the long-tubes first. The bigger the better (2" or 1 7/8").....and don't be fazed by all that talk of needing "back-pressure".

Once you install the headers, THEN make your determination if you need the axle-back. Go for the sound you want, because from a power perspective, they're all in the same ballpark.

KW

[Muskiehunterman]

I am looking at a opposite delima. New to me 2015 1ss/1le with Magnaflow Cat-Back street series, quad tip installed. I have the NPP that came with the car. Street series just doesn’t have enough low end growl, but I am not sure if NPP sound outweighs the performance advantage of the cat back street series.

[KW Baraka]

Originally Posted by Muskiehunterman

I am looking at a opposite delima. New to me 2015 1ss/1le with Magnaflow Cat-Back street series, quad tip installed. I have the NPP that came with the car. Street series just doesn’t have enough low end growl, but I am not sure if NPP sound outweighs the performance advantage of the cat back street series.

Headers...….must...….get...….headers.

[Reichler]

Originally Posted by Muskiehunterman

I am looking at a opposite delima. New to me 2015 1ss/1le with Magnaflow Cat-Back street series, quad tip installed. I have the NPP that came with the car. Street series just doesn’t have enough low end growl, but I am not sure if NPP sound outweighs the performance advantage of the cat back street series.

There’s zero performance advantage between the 2. It’s pure sound.

[Matty Ice]

Originally Posted by TorchedLSX

Thanks for everyones input. Sounds like I will be going with LT's and Xpipe with a controller. Not sure if I want to go cat-less or not though. I love the sound of no cats, but the wife hates the gas smell lol

Don't tell her, but you will still get the smell until the cats heat up. Just keep the windows and doors closed until everything is heated up and you won't smell anything.

[Rons1le]

Originally Posted by TorchedLSX

Thanks for everyones input. Sounds like I will be going with LT's and Xpipe with a controller. Not sure if I want to go cat-less or not though. I love the sound of no cats, but the wife hates the gas smell lol

Here's the answer to the smell.

Power Plus Fuel Fragrances 19769-49
https://www.summitracing.com/parts/plu-19769-49/

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[Bow94z]

I started with stock SS LS3
Added Kooks LT’s with cats and RDP tune.
Sounded good but still too quiet for me with the large jerry can mufflers
Added X pipe and NPP mufflers but still left the stock SS resonators on the car

Certainly more volume on the car esp above 4K rpm. Flaps are always open. I am satisfied with the setup. Thinking about removing the resonators, but don’t want the drone as I have none at the moment. Cruising at 70mph in 6th gear, the car is quiet.

[G8One2]

I'm curious what the stock NPP exhaust would be worth, as a used take off complete setup, would be worth.

[Level300]

Originally Posted by Rons1le

NPP with long tube headers is one of the best sounding exhaust on the Camaro. I don't think there's any performance gains for changing it. when you put long tube headers on and put an x pipe in place of the h pipe. And I put a remote on the fuse so I can go quiet when I want and loud with a push of a button. Download the video and tell me what you think.http://cloud.tapatalk.com/s/5d8034f4...2697833318.mp4

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Yep! This is true. I just installed my headers and it sounds great and not obnoxious.

There is a DYI post on the NPP that allows you to run in Stealth, Always Open or Factory. All you need is to cut one wire and wire up a three position switch.

The stealth is nice because it allows you to make the car as quiet as possible. This is huge if you have neighbors and you have to leave early for work.

[pnwdan]

Originally Posted by Level300

Yep! This is true. I just installed my headers and it sounds great and not obnoxious.

There is a DYI post on the NPP that allows you to run in Stealth, Always Open or Factory. All you need is to cut one wire and wire up a three position switch.

The stealth is nice because it allows you to make the car as quiet as possible. This is huge if you have neighbors and you have to leave early for work.

I second the 3 way switch. Very basic and easy

[IWANTA(ss)]

Originally Posted by TorchedLSX

Thanks for everyones input. Sounds like I will be going with LT's and Xpipe with a controller. Not sure if I want to go cat-less or not though. I love the sound of no cats, but the wife hates the gas smell lol

I have stainless power LTs cats and npp save the couple hundred bucks go cat less I’m pretty much running open headers and I don’t smell any fuel in the car and when I finally hook everything back up I’m going to leave the cats out.

Unless you have to pass emissions