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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 12-04-2012, 03:05 AM   #1
was619
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Cam'ed LS owners- Help with Quiet Exhaust search

Hey All,

I have OBX LT and HF cats, with the Stainless Works Retro Chambered 3 inch catback (factory size hook up)
I have a good bit of drone at highway speeds and have been looking at other options to lower the volume out back before doing a cam instal this spring.

So any suggestions from those of you that have heads/cams ect (pushing more air through) would be greatly appreciated on what would be a better/quieter option.
I have been considering borla, corsa ect.... but it seems that many of these get much much louder after the addition of a cam. maybe dynomax...?

Thank you in advance!

also lets try to avoid the "louder the better" type comments please
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Old 12-04-2012, 03:25 AM   #2
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I have no real world experience. However, both my last camaros were loud and I am not looking to do that again. This time around when I put the headers on I plan on going with the Magnaflow Street system. I've read it's a bit tame but wakes up nicely with headers. I would imagine with a cam too it'd sound mean, but not overhwelming.
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Old 12-04-2012, 08:45 AM   #3
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Factory LS3 catback, paint the cans black. Or, Magnaflow street.

Corsa or the factory system won't drone, but the Corsa is loud.
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Old 12-04-2012, 08:54 AM   #4
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I'm honestly trying to find those answers also. The magnaflow street quiets it down but still drones pretty bad on highway and sounds like a poppy glasspack under WOT.. I hated it and went back to my louder system until I found an answer. I wonder if anyone has good video of what the factory catback sounds like with an H/C setup.. Id be interested in putting mine back together ( i had originally done a muffler delete.) add some bigger tips paint the cans black and go from there.
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Old 12-04-2012, 08:58 AM   #5
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My Corsa is quiet at idle and cruising speeds with no drone but LOUD at WOT.
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Old 12-04-2012, 09:43 AM   #6
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Corsa!
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Old 12-04-2012, 09:52 AM   #7
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I'm honestly trying to find those answers also. The magnaflow street quiets it down but still drones pretty bad on highway and sounds like a poppy glasspack under WOT.. I hated it and went back to my louder system until I found an answer. I wonder if anyone has good video of what the factory catback sounds like with an H/C setup.. Id be interested in putting mine back together ( i had originally done a muffler delete.) add some bigger tips paint the cans black and go from there.
My Magnaflow street does not do this at all. Are you sure you had the 3 muffler system?
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Old 12-04-2012, 10:11 AM   #8
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To the OP. I have LT's with cats, cam/heads, and the Magnaflow street and it is very quiet considering the mods. My car gets mistaken for a stock SS all the time and I love it that way. Sounds like a stock car with a mild axle back at idle. Turns into a complete beast under WOT. The combo should be sold together and named Jeckle and Hyde. It has slight drone at highway cruising but you have to turn the radio all the way off to hear it and it didnt do that until after the cam. You cant use the stock catback because the cam will destroy it. Only other catback that I can think of that you might look into is the Dynomax VT but I always worried about the valves not working. Corsa is not going to drone but it will be loud. Even the L99 Corsa system will be louder than the Magnaflow street. I honestly cant think of a quieter system.
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Old 12-04-2012, 11:47 AM   #9
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i have corsa with lts cats and a cam and its loud as **** i wouldnt recommend it if your looking for quiet
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Old 12-04-2012, 11:54 AM   #10
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Being loud and having drone are two different things to tackle. A J-pipe can kill your drone. Only a quieter exhaust can change the volume. A quieter exhaust does not exactly transfer to no drone.
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Old 12-04-2012, 12:02 PM   #11
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Go back to a 2.5" exhaust or get the Dynomax VT! I had it with my LTs and Cammed car and it was too quiet for me, here is an idle video:
http://www.camaro5.com/forums/showthread.php?t=221083
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Old 12-04-2012, 12:50 PM   #12
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Borla Touring is pretty tame at idle. I currently have it with LTs and Cats. Will be doing a cam swap in March.
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Old 12-05-2012, 06:53 PM   #13
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Quote:
Originally Posted by VADER SS L99 View Post
My Magnaflow street does not do this at all. Are you sure you had the 3 muffler system?
Yes I've owned the Magnaflow street 3 muffler catback and the competition one center muffler catback. as well as the Flowmaster American Thunder catback which I currently have on the vehicle until I get something else.
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Old 12-05-2012, 06:57 PM   #14
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I think I'm going to try and twist my local ZL1 guys arms for their factory catback when they upgrade and go to a quad tip setup
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Old 12-05-2012, 08:54 PM   #15
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I am very happy with my stock exhaust, high flow cats, and headers. 7K miles on it and no issues with stock exhaust. Pleasant when driving normal, but turns some heads when on it.
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Old 12-05-2012, 09:26 PM   #16
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i added mid mufflers to mine, they added cutouts cuz it was to quiet. problem solved.
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Old 12-05-2012, 09:28 PM   #17
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Look into the Solo Mach XL system. It isn't quiet but it is drone free even with headers which for most people is the biggest concern. I've heard this system on a few cars with headers and thought it sounded amazing. It might be loud for some but just about anything short of the factory system will get somewhat aggressive with headers. It should be a good deal quieter then your Retro Chambered SW system and again....drone free.
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Old 12-05-2012, 09:32 PM   #18
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Guys, if you are having a drone problem with any exhaust system the only way to rid yourself of the problem is add J-PIPES. You can do this with a few systems that are equipped with or just go to your local exhaust shop and get them to build and add J-PIPES to the system you have. I did and it worked. PM me if you have questions.
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Old 12-05-2012, 10:00 PM   #19
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I have LT headers with no cats. I have a one off corsa with the L99 xpipe and the touring mufflers, nice sound at idle and sounds like the world's coming to an end but no drone at cruising speeds. out of three exhaust systems I've had on the car this is the best buy far for being quiet.
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Old 12-06-2012, 01:15 AM   #20
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Quote:
Originally Posted by VADER SS L99 View Post
To the OP. I have LT's with cats, cam/heads, and the Magnaflow street and it is very quiet considering the mods. My car gets mistaken for a stock SS all the time and I love it that way. Sounds like a stock car with a mild axle back at idle. Turns into a complete beast under WOT. The combo should be sold together and named Jeckle and Hyde. It has slight drone at highway cruising but you have to turn the radio all the way off to hear it and it didnt do that until after the cam. You cant use the stock catback because the cam will destroy it. Only other catback that I can think of that you might look into is the Dynomax VT but I always worried about the valves not working. Corsa is not going to drone but it will be loud. Even the L99 Corsa system will be louder than the Magnaflow street. I honestly cant think of a quieter system.
Wait what?? Why would the factory catback get destroyed by a cam?
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Old 12-06-2012, 03:19 AM   #21
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Wait what?? Why would the factory catback get destroyed by a cam?
It has happened to more than 1 Camaro5 member on here and I remember reading about it. I dont know why exactly it happened but do know it was after the cam that their muffler internals came apart. Seemed strange to me as well because alot of members are still rocking the stock cans with a cam. Maybe its just 1 of those things that can't be explained, IDK.
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Old 12-06-2012, 06:23 AM   #22
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Supercharged, long tubes, no cats and my magnaflow VT is dead quiet at cruise. It is an awesome exhaust.
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Old 12-06-2012, 06:55 AM   #23
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When I had my cammed SS I ran Dynomax LTs, with hi-flo cats, and a GMPP "street" exhaust, and the car was fairly quiet under part throttle, yet sounded great under hard throttle, no drone.
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Old 12-06-2012, 08:01 AM   #24
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It has happened to more than 1 Camaro5 member on here and I remember reading about it. I dont know why exactly it happened but do know it was after the cam that their muffler internals came apart. Seemed strange to me as well because alot of members are still rocking the stock cans with a cam. Maybe its just 1 of those things that can't be explained, IDK.
I've posted that point a couple of times. My stock mufflers started rattling especially on slow take offs in first gear about a thousand miles after my cam/bolt-on install. Sounded like the baffles in the left one broke loose. I did not cut it open to verify. Just switched to ARH's Pure Thunder mufflers to match the rest of my ARH exhaust. A fellow forum member predicted the problem because it happened to him too.

I wouldn't go as far as to say it happens to everyone. I liked the stock mufflers just fine until they started rattling. You could hear the cam well at idle - it was quiet when cruising - no drone and it wailed at WOT.

If you still have your stock mufflers when you put a cam in - I'd say give it a try. You can always switch later.
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Old 12-06-2012, 09:40 AM   #25
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I got a cam, headers, HF cats as well. I chose to go with the factory cat back because its quiet, but installed noweeds diverters for when I want to be loud and hear the chop of the cam clearly. When the exhaust is running through the cat back, its just as quiet as a stock car on the inside, and only a little louder from the outside. If you still have the factory exhaust on, I'd do what SSdan said and just give it a try. You can always change that later easily.
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