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Old 10-23-2014, 10:42 AM   #1
Ragnar

 
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Drives: '14 2SS 1LE
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That V8 NPP sound with a vert!

First of all, not trying to start anything between the V6 and V8 crowd and my car isn't a vert! So, I had my windows down, sunroof open, and lets just say I did some spirited driving. The sound of the V8 was frikin AWESOME and I can only imagine what it would sound like in a vert! The last time that I had a vert was in 1977 and it was in a 1971 4-speed Vette with a 454 and glasspacks, yes glasspacks! That car was so much fun.

So, if anyone has the opportunity to order a car, I would highly recommend the NPP option. When I ordered my car, I had no idea of what it would sound like. I couldn't imagine that someone would be disappointed with the NPP and it looks great also!

So for ya'll with NPP
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Old 10-23-2014, 04:58 PM   #2
Pork Chop
 
Drives: M6 2013 2SS/RS Convertible
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Quote:
Originally Posted by Ragnar View Post
First of all, not trying to start anything between the V6 and V8 crowd and my car isn't a vert! So, I had my windows down, sunroof open, and lets just say I did some spirited driving. The sound of the V8 was frikin AWESOME and I can only imagine what it would sound like in a vert! The last time that I had a vert was in 1977 and it was in a 1971 4-speed Vette with a 454 and glasspacks, yes glasspacks! That car was so much fun.

So, if anyone has the opportunity to order a car, I would highly recommend the NPP option. When I ordered my car, I had no idea of what it would sound like. I couldn't imagine that someone would be disappointed with the NPP and it looks great also!

So for ya'll with NPP
It is pretty awesome, especially with the top down.
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Old 10-23-2014, 06:20 PM   #3
13vertss/r's
 
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Yep, with the fuse pull its music to my ears. Can't see any aftermarket sounding much better.
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Old 10-23-2014, 10:57 PM   #4
007s 'Vert
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sounds awesome in v6 'vert too......but then again you dont really want to know how it sounds with a V6.....
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Old 10-25-2014, 03:15 AM   #5
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Drives: '14 2SS/RS Vert 6M/KTU/NPP/DTA/ARH
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Yes, even better with LTs+HFCs into the OE catback with NPP. I'm into 'stealth' power not noise and was concerned that headers would make the vert too loud. They do not, at least with this setup (witthout fuse pull BTW). If I keep it under 3000, it is a very pleasing muscle car sound. Above 3000? Well, you know it ain't stock.
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Old 10-26-2014, 10:15 AM   #6
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My LT's, no cats, with exhaust controller open and top down will make you harder than a honeymoon ....!!!
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Old 10-26-2014, 11:41 AM   #7
Bowtie-Bri
 
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I love my NPP in my Convt. I have LT's, high flow cats, and if I want it louder, I just open up the elec. Diverters with a push of a button! Best of both worlds!
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Old 10-27-2014, 12:40 PM   #8
Kreamsicle FreightTrain
 
Drives: 2012 2ss convt m6
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OP I totally agree! Flaps are wide open all the time! The popping during deceleration is amazing also!
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Old 10-27-2014, 02:59 PM   #9
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My 2014 vert came with the NPP exhaust and it sounds great! then I installed a "mild2wild" controller to open and close the valve whenever I want. Even though I usually have em wide open most of the time it's nice to have the option of a more quiet ride when you want it.
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Old 10-27-2014, 08:18 PM   #10
mwendorf3
 
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Drives: 2013 SS Vert IOM
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Agreed.. My vert has NPP and I did the fuse pull as well. Love it.
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Old 02-22-2015, 10:31 AM   #11
captmorgan4u2
 
Drives: 2014 Convertible 2ss/rs
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Ok Im a 5th gen rookie. Explain NPP. Are you refering to the dual exhaust mode?
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Old 02-22-2015, 11:06 AM   #12
el ess A
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NPP is the exhaust RPO code you'd find on your build sheet/sticker. Yes, it's the dual-mode exhaust found as either standard equipment on some, and optional equipment on others. Easy to tell, 4 exhaust tips give it away.

It's probably not as loud and rumbly as some other exhausts, but it has no noticeable drone, and in stock form, will close up the louder port at cruise speeds as to not be adding to cabin noise levels.
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Old 02-26-2015, 12:10 PM   #13
Jasper
 
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Anybody know how the NPP sounds when open v.s. a muffler delete (solo axleback)? Is the NPP pretty much just straight through when open?

I am planning on the solo axleback for my LS3 and hope it sounds at least as good as the NPP.

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Old 02-27-2015, 04:11 PM   #14
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The outers are not chambered so it's like a muffler delete, but the inners are chambered. With fuse pull most of the exhaust will take the path of least resistance (outers) but some of the exhaust will still go through the muffler. This is why the outer tips get black with soot and the inners not so much.
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