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Old 09-18-2019, 09:47 AM   #1
Jbanta1983
 
Drives: 2019 2ss 1LE
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Stock exhaust pinched down

Had my 2019 SS on the lift for the first time and noticed on both exhaust pipes near the back the pipes are pinched in almost halfway? Has anyone else noticed this? Can anyone tell me why they would do that? Seems restrictive but I'm thinking that might be where all the pops come from but I really have no idea.
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Old 09-18-2019, 09:51 AM   #2
ChevyRules
 
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Normal. It's there to make room for the extra bracing for convertibles and it's cheaper to have one version of the exhaust vs multiple versions. Tests have shown there is no loss of power( stock at least) with that crimped exhaust.
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Old 09-18-2019, 10:05 AM   #3
Laststandard
 
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Mishimoto tested it and found they made no difference in power

https://www.mishimoto.com/engineerin...he-crimp-myth/
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Old 09-18-2019, 10:17 AM   #4
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its pinched down but wider through that section so it doesn't really cause a restriction...just looks like shit when you first see it. lol
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Old 09-18-2019, 01:16 PM   #5
Mighty Mouce
 
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Quote:
Originally Posted by Jbanta1983 View Post
Had my 2019 SS on the lift for the first time and noticed on both exhaust pipes near the back the pipes are pinched in almost halfway? Has anyone else noticed this? Can anyone tell me why they would do that? Seems restrictive but I'm thinking that might be where all the pops come from but I really have no idea.

Unpinching makes absolutely no difference in performance its been tested so many times already.
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Old 09-18-2019, 05:03 PM   #6
Jbanta1983
 
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Yea I was just curious. Next time I'll be sure to search the database for any possible threads that relate so I don't piss off the guys that live on here.
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Old 09-19-2019, 03:42 PM   #7
rshelar
 
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Originally Posted by Jbanta1983 View Post
Yea I was just curious. Next time I'll be sure to search the database for any possible threads that relate so I don't piss off the guys that live on here.
You're OK, I'm OK. A search is not always the answer if you don't know the proper terminology. What is helpful to other members though is a good profile.

You don't need to add Camaro (duh), but year, model, man or auto, and vert if you have one. And I'm not sure why members don't add their city and state.
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Old 09-19-2019, 04:02 PM   #8
Emoto
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Originally Posted by VinnAY View Post
6 months and 90 posts and brings up the most discussed item on this forum like it's brand new discovery.
I've only been on the forum since 2015, but this is the first time I have noticed a thread on this topic.
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Old 09-19-2019, 05:07 PM   #9
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well, to be fair, it was discussed a bunch when it was new news back in 2016.

crushed exhaust pipes over near the cats are not going to impact performance at all. The exhaust is too hot to matter. Many tests have been done (some very scientifically) on creating exhaust restrictions via bashing in headers and the exhaust pipes near them with sometimes better effect than the non-crushed originals, but never really statistically changed. Literally 1hp ...maybe 1/3 of 1% up or down.

It's about controlling the sound profile or clearance more than anything else.

as others have stated.
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