Npp exhaust - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

iLilDark · 10-16-2021, 09:15 AM

Hi everyone, I'm thinking of putting npp exhaust on my 2013, I currently have one of those "electric mufflers" where it open and close valves inside the muffler with a push of a button, unfortunately my city doesn't allow that and they allow npp ironiccally, is there a way to install this and have it do what the electric mufflers does? Any idea what device do I need to add with it?
Thanks!

rdavis · 10-17-2021, 07:44 PM

Since my car was originally a non NPP car, here's what I did. Put a T in the vacuum line that is routed behind the throttle body. Ran vac line all the way to the trunk . I bought an electric vacuum switch. Ran the line through the switch then split it & connected each to the muffler. Since the mufflers default to the valve open position, when the vac switch is energized it allows engine vac to the mufflers under light load only. Step on it & engine vacuum drops & the valves open. So not a perfect system. With the vacuum switch not energized no vaccum goes to the mufflers so the valves stay in the default open position. Hopes this may give you some ideas. I'm sure there are other ways to do it. Also it is loud on startup for about 2 secs until the engine builds vacuum to close them.

PhantomBlack · 10-20-2021, 08:05 PM

My car was also non NPP and I hooked it up with an electric vacuum pump I mounted in the spare tire area in the trunk and then ran the switch up to my center console. You can have the valves closed before start up. If anyone is interested I can do a full write up with pics and links to all the parts you need from Amazon. It's pretty easy to set up.

rdavis · 10-20-2021, 08:30 PM

Quote:

Originally Posted by PhantomBlack

My car was also non NPP and I hooked it up with an electric vacuum pump I mounted in the spare tire area in the trunk and then ran the switch up to my center console. You can have the valves closed before start up. If anyone is interested I can do a full write up with pics and links to all the parts you need from Amazon. It's pretty easy to set up.

That would be cool if you would do that.

PhantomBlack · 10-21-2021, 11:54 AM

Quote:

Originally Posted by rdavis

That would be cool if you would do that.

Ok I'll try and have it done by the weekend.

terry_b · 10-21-2021, 09:33 PM

That's so silly... My car has NPP and within the first week of owning it, I pulled the fuse. It's been essentially straight pipes for 80k miles.

Sent from my Pixel 5 using Tapatalk

PhantomBlack · 10-22-2021, 01:01 PM

Quote:

Originally Posted by terry_b

That's so silly... My car has NPP and within the first week of owning it, I pulled the fuse. It's been essentially straight pipes for 80k miles.

Sent from my Pixel 5 using Tapatalk

Being cammed with headers the valves open vs closed makes a big difference in sound. Plus while cruising valves closed eliminates all the drone. I wouldn't call the fuse pull "straight piped" since you still have mufflers and cats....

terry_b · 10-22-2021, 01:58 PM

That's true, I just shake my head at silly rules

Sent from my Pixel 5 using Tapatalk

caper · 10-22-2021, 03:09 PM

mine is just installed and open. still def quieter than the straight pipes i had...but if you want quiet and loud...leave your mufflers on and alone, put in an electric cut out. i have one on my turbo downpipe, i am also cammed. it creates some sound lol. honestly the car is damn loud with it closed too (no cats etc.)

iLilDark · 10-23-2021, 02:40 AM

Well boys the nightmare just arrived, police seized my car and it'll be impound for 6 months along with 12 black points on my license and a fatass fine, I have no idea what to do now since it's my daily car and I live far from work with no transportation options whatsoever, plus about to have my first baby soon, keep me in your prayers my dudes ��

caper · 10-23-2021, 10:27 AM

Quote:

Originally Posted by iLilDark

Well boys the nightmare just arrived, police seized my car and it'll be impound for 6 months along with 12 black points on my license and a fatass fine, I have no idea what to do now since it's my daily car and I live far from work with no transportation options whatsoever, plus about to have my first baby soon, keep me in your prayers my dudes ��

seized it for the mufflers??

KaBoom1701 · 10-23-2021, 11:25 AM

That's crazy! LOL

In a country that sells that much oil to the US they are worried about exhaust too loud in the desert? lol

iLilDark · 10-24-2021, 09:31 AM

Quote:

Originally Posted by caper

seized it for the mufflers??

Yup, Dubai ain't no good environment for any sportscar fans no more, they're seizing every lambo or any car on the road, along with vacuum cleaners like my v6, and I was about to get a zl1 with cams and headers, gotta leave this country now..

1JEWLDSSRS · 10-24-2021, 06:07 PM

Oh wow bro that sucks!! The big one!! Man my heart goes out to ya, hope you can get your car back. That's just not fair, or decent!!! Good luck.

10-16-2021, 09:15 AM	#1
iLilDark Drives: Camaro 2013 LT Join Date: Mar 2020 Location: Dubai Posts: 50 View My Garage	Npp exhaust Hi everyone, I'm thinking of putting npp exhaust on my 2013, I currently have one of those "electric mufflers" where it open and close valves inside the muffler with a push of a button, unfortunately my city doesn't allow that and they allow npp ironiccally, is there a way to install this and have it do what the electric mufflers does? Any idea what device do I need to add with it? Thanks! Attached Images

10-17-2021, 07:44 PM	#2
rdavis Drives: 2012 SS Join Date: Feb 2016 Location: Lubbock Texas Posts: 121	Since my car was originally a non NPP car, here's what I did. Put a T in the vacuum line that is routed behind the throttle body. Ran vac line all the way to the trunk . I bought an electric vacuum switch. Ran the line through the switch then split it & connected each to the muffler. Since the mufflers default to the valve open position, when the vac switch is energized it allows engine vac to the mufflers under light load only. Step on it & engine vacuum drops & the valves open. So not a perfect system. With the vacuum switch not energized no vaccum goes to the mufflers so the valves stay in the default open position. Hopes this may give you some ideas. I'm sure there are other ways to do it. Also it is loud on startup for about 2 secs until the engine builds vacuum to close them. __________________ 2012 2SS/RS 6speed, Howards asa cam on 113lsa Stainless works LT's, NPP exhaust, Z28 Cai, 3.91 gears. Tuned by Blue Thunder 2 racing Lubbock Texas.

10-20-2021, 08:05 PM	#3
PhantomBlack Drives: 2014 Camaro 2SS Join Date: Oct 2017 Location: Brooksville, FL Posts: 181	My car was also non NPP and I hooked it up with an electric vacuum pump I mounted in the spare tire area in the trunk and then ran the switch up to my center console. You can have the valves closed before start up. If anyone is interested I can do a full write up with pics and links to all the parts you need from Amazon. It's pretty easy to set up. __________________ Mods: GPI SS1 VVT cam, TSP long tube headers, LSA conversion, ZL1 fuel pump, ADM FPCM, DW 700cc injectors, Lingenfelter solid isolator, Dedicated Motorsports ZL1 reinforced brick, ADM Griptech 2.5 pulley, JLT CAI, Phastek intake scoop, NPP cat-back, GM 3.91 gears, Eaton Truetrac, Tuned by Chris @ CHenry Motorsports.

10-21-2021, 09:33 PM	#6
terry_b Drives: 2014 2SS/RS 1LE Join Date: Apr 2010 Location: Hudson, MA Posts: 1,387 View My Garage	That's so silly... My car has NPP and within the first week of owning it, I pulled the fuse. It's been essentially straight pipes for 80k miles. Sent from my Pixel 5 using Tapatalk __________________ 2014 2SS/RS 1LE

10-22-2021, 01:58 PM	#8
terry_b Drives: 2014 2SS/RS 1LE Join Date: Apr 2010 Location: Hudson, MA Posts: 1,387 View My Garage	That's true, I just shake my head at silly rules Sent from my Pixel 5 using Tapatalk __________________ 2014 2SS/RS 1LE

10-22-2021, 03:09 PM	#9
caper Drives: 2010 IOM 2ss/RS Join Date: Sep 2009 Location: SoCal, I.E. Posts: 1,545	mine is just installed and open. still def quieter than the straight pipes i had...but if you want quiet and loud...leave your mufflers on and alone, put in an electric cut out. i have one on my turbo downpipe, i am also cammed. it creates some sound lol. honestly the car is damn loud with it closed too (no cats etc.) __________________ Turbonetics running 8lbs boost at 700rwhp tuned by Hi Rev, installed by K&M w/cat-muffler delete, ACS splitter, Fesler GFX, MPD1 spoiler, Custom painted Rally stripes, Cordon CR1 wheels 275/315s, Hotchkiss comp sways and end links, Barton shifter

10-23-2021, 02:40 AM	#10
iLilDark Drives: Camaro 2013 LT Join Date: Mar 2020 Location: Dubai Posts: 50 View My Garage	Well boys the nightmare just arrived, police seized my car and it'll be impound for 6 months along with 12 black points on my license and a fatass fine, I have no idea what to do now since it's my daily car and I live far from work with no transportation options whatsoever, plus about to have my first baby soon, keep me in your prayers my dudes ��

10-23-2021, 11:25 AM	#12
KaBoom1701 KaBoom1701 Drives: 13' ZL1 Red M6 Join Date: Dec 2012 Location: I.E. SoCal (Yucaipa) Posts: 8,630	That's crazy! LOL In a country that sells that much oil to the US they are worried about exhaust too loud in the desert? lol __________________ Mods: Roto-Fab Intake, WW Res. kit & Big Gulp Air Scoop, Elite Catch Can, ATI Super Damper & 18% OD Pulley, LF Idler pulley bracket, Metco CC breather, ID850 Injectors, Stainless Power Headers w/ ceramic coating, TR71X Spark Plugs, JMS Fuel Pump Booster, Bo White TB, Tuned by Ted @ Jannetty Racing, Ron Davis HX, D3 Reservoir, Pfadt 1" Springs, Moreno Camber Plates, ZL1 Addons Splitter guard washers, Tow Hook kit & rock guards, Hurst Shifter Billet Plus 6 Speed Short Shifter, ZL1 DRL lighting harness, ZL1 Recaro Seats.

10-24-2021, 06:07 PM	#14
1JEWLDSSRS Drives: 2011 SS-RS Join Date: May 2011 Location: FLORIDA Posts: 11,435	Oh wow bro that sucks!! The big one!! Man my heart goes out to ya, hope you can get your car back. That's just not fair, or decent!!! Good luck. __________________ TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.