socal_tom

I would like to know what people think of them who have them on there car , how good are they really and hows the sound

crusher1

Here is a clip with them opened and closed.

socal_tom

So do you like them , I found a new takeoff set of GM and thinking about buying them

Jeff-Ford

I like them and leave them open most of the time.

boraxman

socal_tom

Notice any power difference Jeff ? and when there closed no hwy drone correct because I hate that drone and thats why I am going to change the flowmasters I put on

Gary '09 C6

...a M2W switch does the trick !

Jeff-Ford

The power difference is 6hp which I wouldn't notice. I have them open most of the time and I never got annoyed or had issues talking with someone or listening to the radio. It just feels healthy and right with them open.

2010BlueGS

I like the NPP's... IMHO, when they open up, I think it sounds quite ferocious...

2019 ZR1

I love mine. Get the mild to wild and you can choose the sound. I will say that I leave mine open all the time.

tennblkc6

so..with them open there is drone correct?

Don-Vette

I made sure my Vette had NPP. No need to by after market system because like Prego spaghetti sauce..."its in there"!!!

spdkilz911

I have them and love them. I also have the M2W switch, but they stay open 99.9% of the time.

johnny3

I've had them on my 09, now my 013, both convertibles, wouldn't have anything else, no drone at all, closed or open. Run them open 99.5% of the time.

K9KUZ

but about 80%.

Rich Mickol

I say correct. At least for me there is. 2012GS Coupe.

R&L's C6

I dont have NPP but I have rode with people who do and they definitely had some drone at times.

rcwsound

Yes at cruise highway speed. I have M2W for that,open 99.9% of the time.
Would I like them to be Louder? Yes! I leave the window down a bit to hear them better.

Walt White Coupe

It's a great system. Get the Mild to Wild switch and you have quiet or loud when you want. Those that say they don't drone when open don't know what drone is. They drone when open. Get it!

fuel-guy

i close mine on the highway, but leave them open most other times.