Anybody replace NPP ?
Pro
Joined: Jan 2008
Posts: 615
Likes: 0
From: st michaels maryland
Melting Slicks
Joined: Oct 2003
Posts: 2,655
Likes: 5
From: Brea CA
well...
You can install the Mild to Wild Retro kit, in under an hour... took me about 1/2 hour... they make a nice kit, pretty easy to do. Best mod yet.
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Drifting
Joined: Nov 2001
Posts: 1,558
Likes: 224
From: Manitowoc WI
Another here with an '08 ordered with npp and added m2w who is very happy that the sound of the exhaust system can be controlled at the push of a button.
A friend purchased his '08 with standard exhaust and changed it for one of the aftermarket "performance" systems. He now regrets it very much when traveling any distance at highway speeds due to the constant noise level in the car.
A friend purchased his '08 with standard exhaust and changed it for one of the aftermarket "performance" systems. He now regrets it very much when traveling any distance at highway speeds due to the constant noise level in the car.
Safety Car
Joined: Sep 2006
Posts: 4,075
Likes: 6
From: Wilmington NC
My concerns exactly as well as drone with the A6. My NPP is being installed this morning by a local shop who knows how to handle our Vettes. I will be installing the kit myself in the next few days. Until then, the flaps will remain open, it should be fun.
Team Owner
Joined: Nov 2006
Posts: 21,136
Likes: 212
From: Long Island New York
I just did the NPP in my A6 car. You made the right choice. My car has headers and with the butterflies open it is race LOUD! On the hwy it would drive me nuts after a while(sound is subjective of course). When closed it is no louder than the stock cans through headers. Npp gives you the best of both worlds. Jekyll/Hyde.
Melting Slicks
Joined: Apr 2007
Posts: 2,493
Likes: 1
From: Vancouver
That being said, I heard Borla was/is experimenting with a m/w switch (NPP) on some of their products. Best of both worlds I guess (keeping the wife happy). I may go back...if only to reproduce that Borla Stinger (aka: Aggressive) sound.
Red Cell.
Last edited by Red Cell; Jul 9, 2009 at 09:14 AM. Reason: spelling
Safety Car
Joined: Sep 2006
Posts: 4,075
Likes: 6
From: Wilmington NC
I just had mine installed, I can't believe how much larger the tips are and you're right, they are sweet looking. I'm going out right now to polish them with my SonOfDreams kit.
Safety Car
Joined: Sep 2006
Posts: 4,075
Likes: 6
From: Wilmington NC
I just did the NPP in my A6 car. You made the right choice. My car has headers and with the butterflies open it is race LOUD! On the hwy it would drive me nuts after a while(sound is subjective of course). When closed it is no louder than the stock cans through headers. Npp gives you the best of both worlds. Jekyll/Hyde.
I haven't insalled the kit I got from SunsetOrange yet (this weekend) and I can tell you they are loud and on the highway would drive me nuts as well if I couldn't tone them down. Added a whole new dimension in driveing a Vette that sounded like it was a performance car. GM should make this exhaust standard, probably could cut the overall cost.
Drifting
Joined: Nov 2001
Posts: 1,558
Likes: 224
From: Manitowoc WI
With m2w installed its really pretty cool to experience the difference in exhaust sound when cruising at highway speeds. With the tips open there is a definite "drone" sound, but close the tips and its almost like the engine quite running...the difference is that noticeable.
I personally don't plan on doing too much track time with our '08 (did that with the older Vettes in my younger years); I was just looking to control the sound of our car and thought npp was the route to go. If I was looking for all out performance, who knows what we would have hanging on the car for an exhaust system, but for having fun with our C6, there isn't anything better than npp with m2w.
I personally don't plan on doing too much track time with our '08 (did that with the older Vettes in my younger years); I was just looking to control the sound of our car and thought npp was the route to go. If I was looking for all out performance, who knows what we would have hanging on the car for an exhaust system, but for having fun with our C6, there isn't anything better than npp with m2w.
Racer
Joined: Jun 2008
Posts: 350
Likes: 1
From: Fla
Just had the ZO6 muffler mod done. WOW What a difference!
I decided to keep the sound deading material in after having the straight thru pipe welded up. It's perforated so by sealing that up more exhaust note gets thru. Btw - it's quite as ever with the valve closed. However, with the valve open I estimate 30-40% louder over stock ZO6 Npp's. Alot more poping when you decelerate. Hardly any drone either. Cost $250
So if any of you are interested in doing this mod and live in Central Fl., come on down to Lakeland Fl. and See John at TMEC.
Thanks, Dewman
What a difference!I decided to keep the sound deading material in after having the straight thru pipe welded up. It's perforated so by sealing that up more exhaust note gets thru. Btw - it's quite as ever with the valve closed. However, with the valve open I estimate 30-40% louder over stock ZO6 Npp's. Alot more poping when you decelerate. Hardly any drone either. Cost $250
So if any of you are interested in doing this mod and live in Central Fl., come on down to Lakeland Fl. and See John at TMEC.
Thanks, Dewman
Instructor
Joined: Jun 2007
Posts: 133
Likes: 1
From: Atlanta GA
The aftermarket exhausts are nice and sound very mean, but if you are like me, you'll tire of the drone and racket pretty quickly, specially on trips. I use my Vette for traveling and if I leave the fuse off, it really gets tiresome. It's not too bad with the roof off, but with the roof on, it's pretty annoying after a while. Since you basically have 2 exhausts in one with the NPP, you can have your cake and eat it too.
Personally, I would not change my NPP with any aftermarket system unless I decided to not cruise in my car in 6th gear any more
. No kidding, I would only like a louder exhaust if it came with an option to silence it when needed.
Safety Car
Joined: Jan 2009
Posts: 4,681
Likes: 2
From: Mooresville (Race City USA) NC
The solution to that is simple and easy, take a can of flat black spray paint to the hardware; it makes the tips stand out by themselves, especially if you polish them.