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Old 07-04-2013, 12:09 AM   #26
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Will you lose top end power? Will you gain power?
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Old 07-04-2013, 12:42 AM   #27
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The thing about this video though, is that this car looks to have long tubes and a cam at minimum(I also can't spot cats but I'm blind). The volume isn't going to be nearly as loud as this on a bone stock ZL1.

Without anything else done to the car, I just can't see how the diverters would increase the volume much over stock with a fuse pull.
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Old 07-04-2013, 11:05 AM   #28
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Hey Now,

Can anyone speak more to the probable power increase with these? They sound great if they are truly bolt on. Is the actuatot Battery poxered? Otherwis you would have to wire something in right?
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Old 07-04-2013, 12:18 PM   #29
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Double reply. It's the 4th, so everybody must be partyin and not respondin. I'm at Work..arrrggghh.
I did some research on the reduction of backpressure with supercharged cars, and most people say it reduces power and boost.
I'm u
"un-technical", but if somebody knows anyting objective about that it would be appreciated.
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Old 07-04-2013, 02:14 PM   #30
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Double reply. It's the 4th, so everybody must be partyin and not respondin. I'm at Work..arrrggghh.
I did some research on the reduction of backpressure with supercharged cars, and most people say it reduces power and boost.
I'm u
"un-technical", but if somebody knows anyting objective about that it would be appreciated.
Check out their website: www.noweeds.net. It will answer all of your questions. The video on the homepage of the girl in the black Camaro sold me right on the spot! Steve from Noweeds stated that HP increase can be anywhere from 15 to 35, although no dyno number have been run on a ZL1, which is what I ordered it for, and I should have it real soon! Nobody has complained of any power lost/top end. My research/PMs with those that have had the system for over three years and still working perfectly, have all responded 100% Satisfaction and highly recommend. That includes a few ZL1s although they have only had it a year or less, the ones I spoke with, and no problems, well one guy hit something and it knocked it loose. He added a few spot welds.
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Old 07-05-2013, 11:38 AM   #31
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Our objective with the Noweeds dual valve diverters have been expressly to enhance the sound of the vehicle throughout its operating range.

Yes, they will enhance the sound of any V8 Camaro, some more than others.

In Dyno testing, with open diverters, we have generally experienced a higher peak HP number.

The video posted is of a NicKey Stage II S, and it does feature our Old Skool style Stage II Cam. It does have Hi-flow cats as well.

We have been using the systems since the first 5th gens rolled off the transporters and have logged tens of thousands of miles with no issues.
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Old 07-05-2013, 12:15 PM   #32
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Our objective with the Noweeds dual valve diverters have been expressly to enhance the sound of the vehicle throughout its operating range.

Yes, they will enhance the sound of any V8 Camaro, some more than others.

In Dyno testing, with open diverters, we have generally experienced a higher peak HP number.

The video posted is of a NicKey Stage II S, and it does feature our Old Skool style Stage II Cam. It does have Hi-flow cats as well.

We have been using the systems since the first 5th gens rolled off the transporters and have logged tens of thousands of miles with no issues.
You say "V8 camaros" and 100s of miles on "5th Gens", but have you had a significant experience with specifically the ZL1 which is supercharged?
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Old 07-05-2013, 12:38 PM   #33
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Yes, you can say that we have had some experience with ZL1s.

Last edited by NicKey; 07-05-2013 at 04:46 PM.
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Old 07-05-2013, 03:49 PM   #34
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Just placed my order should have it frist week in August.
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Old 07-05-2013, 04:01 PM   #35
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Personally I wouldn't put them on without headers or HF cats, because you will be very disappointed with the outcome with the OEM cats.
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Old 07-05-2013, 05:25 PM   #36
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Personally I wouldn't put them on without headers or HF cats, because you will be very disappointed with the outcome with the OEM cats.
Is that because they are so restricted inside that it doesn't really matter what's downstream? I saw an old thread where somebody ur the ZL1 cat one and it is really restrictive to air flow.
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Old 07-05-2013, 08:25 PM   #37
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Personally I wouldn't put them on without headers or HF cats, because you will be very disappointed with the outcome with the OEM cats.
Not true, they sound amazing!!!!!!! I have had them on for about 4 months now. I pretty much keep them open all the time! I have NO regret and they sure turn heads. People want to know what the heck all my mods are. All I have is noweeds and rotofab.

Car finally sounds like it looks - MEAN
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Old 07-05-2013, 09:00 PM   #38
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Not true, they sound amazing!!!!!!! I have had them on for about 4 months now. I pretty much keep them open all the time! I have NO regret and they sure turn heads. People want to know what the heck all my mods are. All I have is noweeds and rotofab.

Car finally sounds like it looks - MEAN

You see there's the rub, mine are so loud with HF cats I can't drive with them open all the time. I've heard mine before and after the HF cats, and before they sound around 2X louder than the exhaust normally does.

Here's mine ...

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Old 07-05-2013, 09:09 PM   #39
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You see there's the rub, mine are so loud with HF cats I can't drive with them open all the time. I've heard mine before and after the HF cats, and before they sound around 2X louder than the exhaust normally does.

Here's mine ...


auto...........why..............why........
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Old 07-05-2013, 09:12 PM   #40
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auto...........why..............why........

Because I also have a manual SS, for when I want to row gears ...

Where's your auto ?
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Old 07-05-2013, 09:13 PM   #41
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2 camaros ago =]
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Old 07-05-2013, 10:24 PM   #42
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This looks like one fun mode for the stock set up.
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Old 07-05-2013, 10:34 PM   #43
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Nothing for us Ragtop pilots in the Noweeds site....Bummer!
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Old 07-05-2013, 10:37 PM   #44
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Nothing for us Ragtop pilots in the Noweeds site....Bummer!

Pipes is pipes, doesn't make a difference if soft top or coupe.
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Old 07-05-2013, 10:50 PM   #45
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Pipes is pipes, doesn't make a difference if soft top or coupe.
All 7 pipes they sell say(NOT CONVERTIBLE)
must be the X-tra frame bracing as to no mnfg for this model at this time
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Old 08-29-2013, 05:26 PM   #46
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Not the best quality, but it get the point across!
http://youtu.be/hSlYk6m5AVo


Sent from my iPad using Tapatalk - now Free
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Old 08-29-2013, 10:12 PM   #47
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Not the best quality, but it get the point across!
http://youtu.be/hSlYk6m5AVo


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I think this is the route for me this sounded really good. Don't want to offend anyone but to me personally i hate the pop that comes with the headers and aftermarket exhausts ive heard on the zl1. This sounds clean and loud and seems to be what I am looking for.

Do you have any additional details as to is there a specific place they are mounted or is it just right after the cats?
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Old 08-30-2013, 12:24 PM   #48
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Originally Posted by SlingShot View Post
You see there's the rub, mine are so loud with HF cats I can't drive with them open all the time. I've heard mine before and after the HF cats, and before they sound around 2X louder than the exhaust normally does.

Here's mine ...

Slingshot: Where Did You Get Those Rear (Front) Splash-Guards?
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Old 08-30-2013, 12:45 PM   #49
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Slingshot: Where Did You Get Those Rear (Front) Splash-Guards?

Came standard on the car, they should all have them.
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Old 09-07-2013, 07:51 PM   #50
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I think the noweeds system would be awesome. Think that will be one of my first mods !
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