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Racer
Joined: Apr 2006
Posts: 495
Likes: 1
From: Valley Stream NY
There is an acceptable amount of drone IMO. Besides if you have the NPP exhaust grab the M2W set up and the question will be moot. No complaints on my end.............
Safety Car
Joined: Sep 2006
Posts: 4,075
Likes: 6
From: Wilmington NC
Your profile does't give any info on your Vette. The drone issue apparently is only an issue with A6's, not M6's. Also, everyones tolerance for drone is different so what I might think is objectionable, you might think is acceptable. Right now, I'm living with it but I would prefer there was zero drone especially on long cruises.
Racer
Joined: Mar 2009
Posts: 447
Likes: 0
From: Adkins Texas
Had mine installed Saturday. Stock nonNPP mufflers. No drone, love the sound... Details in the link.
http://forums.corvetteforum.com/sout...ys-at-rpt.html
http://forums.corvetteforum.com/sout...ys-at-rpt.html
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
You WILL get drone, but when the NPP valves are closed it isn't bad. If you have an aftermarket exhaust it will be bad.
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Le Mans Master
Joined: May 2011
Posts: 5,022
Likes: 18
From: Tampa FL (formerly Justinjor)
Tech Contributor
St. Jude Donor '11-'12-'13-'14
With my npp closed, you can barely hear my exhaust. With the flaps open though, its loud as hell and drones pretty badly at highway speeds with a little more than 'cruising' throttle.
Melting Slicks
Joined: Jul 2010
Posts: 3,271
Likes: 20
From: Georgia
Race Director
Joined: Mar 2011
Posts: 13,262
Likes: 3,150
From: SW Florida
2021 C6 of the Year Finalist - Modified
So, I take it that with long-tube 1 3/4" headers with cats, there will be no drone for A6 cars with the NPP mufflers (as long as the NPP valves are fully closed during normal driving) ?
I am not using the M2W on my GS
I am not using the M2W on my GS
Safety Car
Joined: Apr 2010
Posts: 4,231
Likes: 451
From: Maryland
No drone at cruise with my A6 GS
I have 1 3/4" headers, 3" X-pipe without cats, but I run the "430 hp" non-NPP stock mufflers. The tone at idle is just "slightly" more than stock and at cruise it's completely quiet in the cabin just as it was stock. Under full guns it does make more noise but really not that loud either.
Looks like the secret is using those cheap stock "430 hp" mufflers that everyone wants to get rid of. No dyno on my car but it runs OK for the few low cost mods it has.
Looks like the secret is using those cheap stock "430 hp" mufflers that everyone wants to get rid of. No dyno on my car but it runs OK for the few low cost mods it has.
Last edited by C7/Z06 Man; Feb 17, 2012 at 01:54 AM.
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
But yes, I had that setup for 3.5 years and loved how it sounded, but the drone is obnoxious.
I currently have Longtubes, Catless X-pipe and a Z06 exhaust and it DOES drone with my A6 with the valves closed. It's quiet, but it's there. It's unlikely that it will bother you. But there is some level of drone...very easy to mask with a little music/radio.
