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Old 10-16-2021, 10:15 AM   #1
iLilDark
 
Drives: Camaro 2013 LT
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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!
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Old 10-17-2021, 08:44 PM   #2
rdavis
 
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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.
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Old 10-20-2021, 09:05 PM   #3
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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.
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Old 10-20-2021, 09:30 PM   #4
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Originally Posted by PhantomBlack View Post
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.
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Old 10-21-2021, 12:54 PM   #5
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Originally Posted by rdavis View Post
That would be cool if you would do that.
Ok I'll try and have it done by the weekend.
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Old 10-21-2021, 10:33 PM   #6
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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.

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Old 10-22-2021, 02:01 PM   #7
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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.

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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....
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Old 10-22-2021, 02:58 PM   #8
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That's true, I just shake my head at silly rules

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Old 10-22-2021, 04:09 PM   #9
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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.)
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Old 10-23-2021, 03:40 AM   #10
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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 ��
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Old 10-23-2021, 11:27 AM   #11
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Originally Posted by iLilDark View Post
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??
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Old 10-23-2021, 12:25 PM   #12
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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
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Old 10-24-2021, 10:31 AM   #13
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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..
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Old 10-24-2021, 07:07 PM   #14
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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.
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