08-25-2021, 12:23 PM | #1 |
Drives: 2017 Camaro 2LT RS 3.6L Join Date: Mar 2016
Location: Orange Park, Florida
Posts: 1,313
|
Add NPP Question.
Hey y’all,
(This is how Im spending my lunch break today, looking at things I’d like to buy someday ). I want to add the NPP exhaust to my car (for looks and sound, if I’m honest). I can’t find a good aftermarket exhaust that doesn’t sound “rice”. I love the sound of the stock NPP setup. I can’t find any way to buy the NPP setup either as a cat back or axle back. I only found the entire system of course. Is there a part number for basically half the system? https://www.gmpartsdirect.com/oem-pa...bC12Ni1nYXM%3D If not, is there any aftermarket systems that sound close to stock? Every video I find, doesn’t fit my fancy. I’m open to ideas. Thank you! |
08-25-2021, 12:37 PM | #2 |
Drives: 2018 Camaro V6/RS Join Date: Nov 2018
Location: MI
Posts: 1,596
|
IMO the V6 sounds quite a bit different in person than in videos, with an exhaust system. I've drove a few with the NPP, and personally I like my Flowmaster non NPP better without question.
|
08-25-2021, 02:25 PM | #3 |
Drives: 2016 2SS Convertible Join Date: May 2012
Location: St. Louis, MO
Posts: 1,711
|
You could install the NPP exhaust but I don’t think you’ll be able to control the valves if your car didn’t come with NPP from the factory. You would probably have to wire the valves open or closed. You might be better off with a non-NPP exhaust.
|
08-25-2021, 04:16 PM | #4 |
Long hauler
|
I got the stock exhaust from a ZL1, I had a shop cut it at the axle-back and they welded it on. Looks great and the sound did get a bit deeper, the valves are always open but I don't mind that.
__________________
|
08-25-2021, 08:48 PM | #5 |
Drives: 2017 Camaro 2LT RS 3.6L Join Date: Mar 2016
Location: Orange Park, Florida
Posts: 1,313
|
|
08-25-2021, 08:49 PM | #6 |
Drives: 2017 Camaro 2LT RS 3.6L Join Date: Mar 2016
Location: Orange Park, Florida
Posts: 1,313
|
I think your right, in order for them to work you need the computer flashed.
|
08-25-2021, 08:50 PM | #7 |
Drives: 2017 Camaro 2LT RS 3.6L Join Date: Mar 2016
Location: Orange Park, Florida
Posts: 1,313
|
Interesting! Did you buy it new? Or I’m assuming from a junk yard or something?
|
08-26-2021, 08:18 AM | #8 |
Drives: 23 ZL1 A10 Rapid Blue Join Date: Aug 2020
Location: MO
Posts: 1,992
|
Can't add NPP to a car that didn't come with it OE.
|
08-26-2021, 09:45 AM | #9 |
Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017
Location: East Tennessee
Posts: 11,616
|
It's gonna be an ordeal unless someone has already done it and can give you a part number list, plus you find a dealer or third party willing to flash a system upgrade for an NPP car's VIN. I'm not even sure the main body wiring harness will have the leads to the NPP actuators.
Honestly, I would probably just let it go and buy a quad tip AWE system instead.
__________________
2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune 1100 - 1/30/18 | 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 | 3800 - 2/26/18 4300 - 2/27/18 | 4B00 - 3/01/18 4200 - 3/05/18 | 4800 - 3/14/18 5000 - 3/16/18 | 6000 - 3/19/18 |
08-26-2021, 06:29 PM | #10 | |
Long hauler
|
Quote:
Don't buy stock exhaust new, it would waste a massive amount of money and like arpad said you could get an aftermarket exhaust that would sound nicer, have a quad look, and be cheaper. I have been throwing around an idea of jerry-rigging a system to control the NPP valves and let me tell you it is a rabbit hole. Most of the solutions or ideas are from the CorvetteForum since Corvettes got the NPP system before us and kept using it up till the 2020 (I'm not sure if they changed it but they probably did). First, there is Theta who sadly went MIA after so much development. He was probably the furthest into the NPP project as a singular person. You can read through that entire thing but be warned it leads to nowhere unless you have knowledge in electrical engineering or the sort. This used the original NPP actuators. (If you like reading of our cars or similar, he did a LOT for the CorvetteForum, since we get mostly everything from the Corvette's but a few years later is a nice read) Second, there is CityOf9Gates who went the fully custom route and did his control through Arduino and some slight wiring/programming. I followed this but didn't have the time or patience after failing at some of the code lol. It may work but you'd need some type of fabrication to keep the system safe as it's on the undercarriage. Third, there was g8germany who like his name was most likely from Germany. His thread is short but not very descriptive. He did include a proof of concept though so there's hope I guess. This also used the original NPP actuators. He says he did his through Arduino as well. Lastly, and I actually want to try this out is Total Performance Racing who have made an almost plug and play harness. From their description, all you need to do is wire ignition power, ground, and a switch of your choice to the existing NPP actuators and it apparently works. This seems like someone who either went in Theta's footsteps or used Theta's work to make, Theta did say that anyone could make and distribute them so I don't think Theta would be upset if he's still around. But yeah, that's the method I know of after looking into it occasionally over the years. Now aftermarket though, there is one I know of and it's the most expensive but imo the coolest idea. NOWEEDS has a system that is essentially adding an exhaust dump at the touch of a switch with their own actuators and piping so it's not OEM style. But not everyone wants to pay $900 for a straight pipe essentially with a switch.
__________________
Last edited by Bumbleboy92; 08-26-2021 at 09:30 PM. |
|
08-31-2021, 01:29 PM | #11 | |
Drives: Camaro V6 2017 Join Date: Jan 2020
Location: TX
Posts: 73
|
Quote:
If you want loud go MBRP, deep go American Thunder and for the best engineered sound quality try Borla(2 sound options). The NPP is quiet and doesn't sound that good either(with valves open) until you go into higher rpms, then it sounds great. I don't like that, since how often do you really drive in high rpms? Videos will usually just show high rpm drives, that doesn't really translate to real life driving experience imo. |
|
09-25-2022, 07:10 AM | #12 |
Drives: Supra, GTR R-34, RX-7 Join Date: Aug 2022
Location: Calgary, Alberta, Canada
Posts: 33
|
We have lots of usable parts and accessories that can be used in camaro or other chevys and ford. To Visit our junk yard Click Here...
|
09-26-2022, 10:24 PM | #13 |
Drives: Wild Cherry LT1 Join Date: Dec 2016
Location: Massachusetts
Posts: 1,925
|
It may just be me, but I prefer my NPP to not be NPP. I have the actuator(s) fuse pulled so the valves are always full open. I just don’t think the exhaust is loud or obtrusive until you start getting to around 3K rpm… which is in and around the time the valves open anyway. There’s zero drone on the highway.
As has been mentioned, If you’re goal is looks and some extra sound, a used NPP set up and a quad opening lower bumper section should do the trick (on the cheap). |
09-30-2022, 07:10 AM | #14 | |
Drives: 2017 Camaro 2LT RS 3.6L Join Date: Mar 2016
Location: Orange Park, Florida
Posts: 1,313
|
Quote:
|
|
|
|
Post Reply
|
|
|