ToplessLS3

Can a non dual mode exhaust car be converted to dual mode?

Yes or no.

If it can,

will it be expensive to do?

Thanks!

cmnguye8

from what I seen on the forum so far, I believe so. NPP in a box

foremaw

Yes.

http://forums.corvetteforum.com/c6-c...it-system.html

coolcat

If you get the NPP system installed on your ride don't forget to pull the fuse.
Rolling with the flaps open 24/7 has its advantages.
Not only will your engine work more efficiently which will lead to among other things
better fuel economy but you'll get that deep powerful robust exhaust note all the time.
No more of that wimpy girlyman quiet exhaust sound.

As Jay Leno says when it comes to the Corvette exhaust system "noise is good!"



http://www.jaylenosgarage.com/at-the...exhaust-trick/

mdb917

The thread that is shown by foremaw is excellent but it does not address the other part of the equation.

If you do not have NPP bi-mode mufflers you will also need those. I have been told you can catch them on the large auction site for $650-800 used. New ones run about $1500 for the pair.

The Mild-2-Wild is one of two options that people use. The other is offererd by Sunset Orange Creations (also a forum vendor). Both have their advantages/disadvantages and they both have extremely good customer service and will help all the way thru.

PM me if you want more details. I just converted my '07 to a bi-mode muffler system and am a recent graduate of that school. It is a straight forward process and I would suggest you add them to your car.

vampire81

but you still need to have the NPP mufflers

NYC6

Thats true for alot of us, especially those who are multi millionaires and dont care about getting summones.

I like the NPP in a box version. For $100 I control the mode at the touch of my visor button or my remote control. There are times where I dont want it to sound like a monster on the street, like when driving past a patrol car. Last year a friend of mine asked me to take him to his dads funeral in the Vette. Of course I did it for him. Im sure glad I could touch a button when driving into the Church lot and then in the procession to the gravesite. There are times for civilized and times for unabashed noise and violence. I like having both in the same car.

Swiftrider08

Some bad information in this post.

1. If you install NPP on a non factory NPP car, there will be no fuse to pull. That part of the factory control system will not be there on a non factory NPP car.

2. Leaving the flaps open all the time is not going to increase your mileage or engine efficiency. That is just a blank comment. Yes, the factory does rate the NPP system at an additional 6hp, but you are never going to feel that. Also, with the NPP open all the time, you are going to see more exhaust soot buildup on the center tips.

To add NPP to your car, you will need the mufflers and an exhaust controller. The mufflers are going to run you $700-$1000 used and more like $1300-$1400 new. There are a few exhaust controllers on the market, but I would recommend the "NPP In A Box" that goes for a little less than $200.

vettn71

You can find Z06 takeoffs on this forum for $300 to $500 a set. I paid $400 for mine. Had them installed at a muffler shop with a new custom x-pipe (2 1/2" to 3"), which cost $500. NPP In a Box $175, so total cost was $1075 installed

Jim

coolcat

WRONG!!!

After my Chevy dealer pulled the fuse
my gas mileage improved on my DD 08 coupe.

And it's noticeably quicker off the line.

Top_Fuel

Z06 and non-Z06 dual-mode (NPP) mufflers are different and do not interchange without modifications.

If you have a non-Z06 C6, buy non-Z06 NPP mufflers and they will bolt on with simple hand tools and NO modifications. Used Z06 NPP mufflers are generally cheaper...but remember that you will have to pay an exhaust shop to make them fit. So keep that in mind when shopping.

Also note that 2009-up dual-mode mufflers are different than 2008 and older models.

NYC-Style

The answer is no to the conversion...but yes you can add an aftermarket exhaust...i.e. NPP or B&B fusion...good luck!

Hogvette

Is this substantiated through track times, or just your "seat of the pants" feeling?

I love my NPP exhaust on my 07 A6, but I have a hard time with the statement that it is "noticeably quicker off the line"... I've always said the NPP exhaust is for dB not HP.

Bmbl-Bee

With the flaps open at highway speeds you will get some drone.

saplumr

Would it not be much simpler to buy a "real" exhaust?

Hogvette

AtHomeSoda

NPP... Is Real... It ALSO has the option to SOUND Stock, at the push of a button... If you put on one of your so called "Real" exhausts, you also get real drone, with no options... MOST all the people with NPP really like it. I do.

BB 2005

There doesn't seem to be another exhaust system that is quiet enough when you want it to be. The Fusion may be??

Then there is the question of real. I bought a CHEVY NPP exhaust, to me that is the real one.

saplumr

Just curious...what would be the reason for the "quiet" mode when the open mode is not loud?

AtHomeSoda

In the OPEN Mode...It is as loud as I want it... trust me... when you get on it, it turns heads... If you want louder...Bullets seems the way to go... But, at my age... I am happy with the NPP sound..

PS.. Some people think the ZO6 Bi-Mode is the same as NPP for sound... IT is not.. the NPP is LOUDER.