Exhaust collars for NPP dual mode
 

Who has these installed and how do you like them? I've been thinking of getting a set to add with my M2W.

I have a set, but they are not installed. I like the sound with it wide open, and only close them during early morning cruising through my very quiet neighborhood.

I have them installed and are still experimenting some. They're nice as you can determine how much you want the valves to close if you don't want the complete silence.

I think I'm one of the few that do have them on, and have for about three years. Excellent is my opinion (don't have M2W). Keeps them open just a bit all the time which means I hear the exhaust the way I like it throughout the rpm range, and when I floor it, it's wide open. Had to adjust them more closed than I thought---too much noise at 1/4 open.

AO, this is true. To significantly reduce the sound you need to have it almost closed.

Who sells these?

Here is where I purchased mine:

http://www.nakidparts.com/

absolutely correct for my car; almost closed but that works just fine for me!:cheers:

Agree. I have the kit from southern car parts where you can set the rpm's to where the valves will open and close. I really like that and with the collars it gives you even added versatility.

I installed the collars to keep it slightly open (about 1/4") all the time.

The sound was perfect for me. Works great, very pleased! :thumbs:

The collars are easily adjustable... you can fine-tune the "quiet" mode... make it exactly as loud as you want!

With the engine off...
http://i381.photobucket.com/albums/o...s/529bfd89.jpg

With the engine at idle...
http://i381.photobucket.com/albums/o...s/4a0cce57.jpg

Of course, this does NOT affect the NPP's normal operation -- it still fully opens the exhaust above ~3500 rpm.

And with an exhaust controller (M2W, Sunset Orange) you can still remotely fully-open the exhaust whenever you want.

Grest post CO, and to make it even easier you are given and very long allen wrench to help facilitate the install.

:iagree:I had the collars on my grand sport, and now have them on my 427 Convertible..... the NPP quiet mod is just too quiet for me:D

I'll add mine to the pile. Great addition to the dual mode exhaust. It's just a little too quiet without the collars.

Thanks gents! I agree that the exhaust is just too quiet with the valves completely shut. I'm going to install a set of these collars.

That's where I purchased mine also. I don't think he sells them any more. Maybe you can find something at the hardware store. ???? I love them just the right tone. Wide open is to loud for my old ears

Hi Rudy, hope you are well! :thumbs:

Mc Master-Carr "Two-Piece Clamp-On Shaft Collars"?

What is the diameter of the shaft???

Car is at my mothers house so I cannt get at the car right now. go out in your garage and measure it. :D

I would if I were retired! :flag:

Nice your Mom let's you drive her car though...

I just ckd his website and unless he's just out of them, it's still on his website under mild to wild. Can't list website 'cause he's not a vendor but you know where to go. Plus, I did forget in my post that extra long allen wrench to adjust the screws. Seems flimsy but is thin and high strength!

:lurk: