Muffler delete???
Racer
Joined: Dec 2013
Posts: 458
Likes: 8
Advanced
Joined: Oct 2005
Posts: 71
Likes: 0
Advanced
Joined: Oct 2005
Posts: 71
Likes: 0
I completely agree. It does sound as quiet as a Saturn. This is by far the quietest vehicle I've ever had. I picked up an SLP LM1 and god I hope it makes a difference. If not I'm headers are next sooner than latter this year. A co-workers v6 mustang has more sound than my vette. I just don't think it could ever get too loud. My daily driver is L92 Denali with Dynatechs, highflow cats and a cherrybomb 3.5 SI/SI before the rear tire. That's loud. My vette, needs to be louder than that. I almost removed the stock axel back and drove like that but it seems it would look weird without the tips.
Instructor
Joined: Jan 2012
Posts: 112
Likes: 0
From: Moose Jaw Saskatchewan
Sound...
Hi,,, To lots of folks, race cars must be offensive for most have no mufflers or a least a very small resonator type that hardly does anything but is required. Those cars are being driven full bore the entire race and are very loud indeed. For what people deem to be offensive sound , others including myself hear it as quite pleasant and not offensive at all. Straight pipes on a street car are not driven, (usually) , with the throttle mashed to the floor boards every two seconds. So that being said ,muffler delete pipes on a C6Z sound awesome with no drone and you ditch about 50 Lbs off the back end if that's important. A before and after test was evaluated and the car picked up RWHP with no further tuning changes running no mufflers. It turns the system into a true three inch exhaust . The less back pressure the better for performance is the myth exposed .So when you see the popo let off and go into cloak mode like they do when they approach the decibel meter on track lol. 
everyone.
everyone.
Melting Slicks
Joined: Jul 2008
Posts: 2,151
Likes: 6
From: Oceanside Ca/ Tampa FL
In my opinion go with a good set of longtubes, X pipe and NPP exhaust. On my LS2 I went with the Kooks 1 7/8 Longtubes, 3 inch X pipe and Z06 Mufflers with the muffler mod completed on it and it sounds amazing!!!! I did the whole muffler delete on one of my C5s years ago and I didn't like the way it sounded with stock manifolds at all. I installed some American Racing headers on it and it was a night and day difference. I will take the car out tomorrow for some vids and I will post them up. Jay
Heres a video of the same exact setup that I have except I don't think he did the muffler mod to it..
Heres a video of the same exact setup that I have except I don't think he did the muffler mod to it..
Last edited by 96mogt; Mar 2, 2014 at 01:38 AM.
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Le Mans Master
Joined: Oct 1999
Posts: 8,205
Likes: 40
From: Tucson AZ
It has serious drone in the car at all RPM's and it gains no power.
If you liked it on a CTS then you will likely be fine with it on a covette. Im just trying to keep people from making the swap and then going back to a NPP exhaust after they had enough drone on the hiway. Its your money.
Melting Slicks
Joined: Mar 2011
Posts: 2,708
Likes: 83
From: Arkansas
The Z06 has 3" pipe up to the last inch before the muffler. It necks down to 2.5" to enter the muffler and the pipe at the muffler exit is an actual 2.31" OD on the butterfly valve side and 2.18" OD on the quiet side.
The NPP has 2.5" all the way into the muffler, but also has the same exit.
It's been a while since I cut off some of the base tips, but I'd suspect they would also use the 2.18" OD pipe for the muffler exit.
The NPP has 2.5" all the way into the muffler, but also has the same exit.
It's been a while since I cut off some of the base tips, but I'd suspect they would also use the 2.18" OD pipe for the muffler exit.
..........it's been mentioned numerous times here.....
