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Concept 841 headers

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Old Jul 31, 2025 | 07:47 AM
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Default Concept 841 headers

Does anyone have any experience with 841 on a c5z ls6.
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Old Jul 31, 2025 | 11:07 AM
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Search function:

https://www.corvetteforum.com/forums...1-exhaust.html
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Old Aug 9, 2025 | 02:52 AM
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Bought their full system a month back. Cost a lot for a car of this age. But was going to spend 2k on arh headers to my rusted corsa 20yr old exhaust. Figured do it up. CN post back when I install it. But Catless with a valves catback and only paying 60% upfront till next year seemed worth it for that sick *** sound it will make
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Old Aug 9, 2025 | 08:42 AM
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That's a fairly complex, "race-like" exhaust system, kind of like a "tri-y" on steroids. Whether or not it's worth $4K, is another question, but given the assumed amount of hand fabrication required to make them, I can understand why they're so pricey.
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Old Aug 12, 2025 | 08:27 PM
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Looks like there was a video just posed on IG.
View this post on Instagram
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Old Aug 12, 2025 | 08:31 PM
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Originally Posted by leadfoot4
That's a fairly complex, "race-like" exhaust system, kind of like a "tri-y" on steroids. Whether or not it's worth $4K, is another question, but given the assumed amount of hand fabrication required to make them, I can understand why they're so pricey.
But is really that much more expensive if you buy American racing headers, X and a corsa?
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Old Aug 14, 2025 | 12:24 PM
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Originally Posted by Rozee06.
But is really that much more expensive if you buy American racing headers, X and a corsa?
I have no idea....
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Old Aug 16, 2025 | 01:29 AM
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I gave the more verbose version of my response on a clone thread just now. But the keys to me are no significant gains vs others, the sound is now very non-Corvette, and it has this vague poser value to it as a mod. TO ME anyway, you know that means little. It seems like the type of thing which would fit in with a kid owner with Infirai infinity brake lights and tires which poke or the like.
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Old Aug 25, 2025 | 08:27 AM
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Originally Posted by Tusc
I gave the more verbose version of my response on a clone thread just now. But the keys to me are no significant gains vs others, the sound is now very non-Corvette, and it has this vague poser value to it as a mod. TO ME anyway, you know that means little. It seems like the type of thing which would fit in with a kid owner with Infirai infinity brake lights and tires which poke or the like.
The wonderful thing about being an individual is having individual taste. There are all kinds of different flavors out there when it comes to modifying Corvettes. Prefacing your categorical alignment of Infirai brake lights or tires with poke as “to me” doesn’t soften the tone—it comes off as about as tone deaf as the cliché rhetoric of geriatric men wearing jean shorts, New Balance shoes, and enough chrome on their Corvettes to blind you. While both stereotypes may hold some truth, I think it’s best to let the clichés identify themselves.

More to the point of the post: I haven’t seen any measurements performed on a C5 to substantiate claims of power gains or fitment with this exhaust system. That said, I’m sure many folks have heard the Celeritech headers featured on the C6 Grand Sport from Hoonigan. One of the big issues with these videos—though we’re all aware of it and tend to forget—is that exhausts sound very different outside the video experience. The whole “it sounds very different in person” feedback is common.

Based on the videos, it seems to have a significant amount of rasp (which I think is captured fairly well), likely due to the muffler design of their catback. I believe if you just get the headers and midpipe, then pair them with a catback of your choice, it should produce a sound more favorable to those who prefer a traditional tone. My plan is to couple it with a pair of Vibrant Ultra Quiet resonators to tame the rasp and possibly incorporate a Z-pipe to help even out the pulses before they exit the vehicle. We’ll see. Fortunately, I have a talented local fabricator who can handle that for me—which I know is a luxury not everyone has.
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Old Aug 25, 2025 | 10:31 PM
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We'll probably find out soon. Justin Peachey is going to run the headers and mid. Not sure if he plans to leave it uncapped for a while, but eventually there will be a muffler system added to accommodate tracks with decibel limits.
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Old Aug 26, 2025 | 07:53 AM
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Justin and I spoke a few months back about his setup. He told me he was running the headers and mid-pipe back then but, with a different catback. But his setup is what got my attention. I like the way it comes across in video but, I still think it has a bit too much rasp for my taste--but, that's my problem to remedy. Recently, I saw him running a turbo setup and I believe he mentioned it having a 5.3. I think that might be a different car, though.
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Old Aug 26, 2025 | 01:59 PM
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Originally Posted by Tusc
We'll probably find out soon. Justin Peachey is going to run the headers and mid. Not sure if he plans to leave it uncapped for a while, but eventually there will be a muffler system added to accommodate tracks with decibel limits.
I'm pretty sure he's been running them for a while, he's got some videos on Facebook.

Personally, coming from a car that has equal-length headers, my Corvette has always sounded to my ears like it's misfiring, so I'm looking forward to equal length headers. If not this winter then next.
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