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Old 07-30-2020, 10:33 PM   #1
cmitchell17

 
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Looking to Trade Primary Cat Delete Pipes for Stock Cat Pipes

I got some cat delete pipes and ended up not liking the sound. So I want to even trade for a set of stock cat pipes, GM PN# 23463697 and 23463698.

Thanks
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Old 07-31-2020, 05:26 AM   #2
jaybee924
 
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Quote:
Originally Posted by cmitchell17 View Post
I got some cat delete pipes and ended up not liking the sound. So I want to even trade for a set of stock cat pipes, GM PN# 23463697 and 23463698.

Thanks
Do you have any videos of how the exhaust sounds with the cat deletes?
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Old 07-31-2020, 06:10 AM   #3
BigGuy81
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PM'd.
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Old 07-31-2020, 10:41 AM   #4
cmitchell17

 
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Originally Posted by jaybee924 View Post
Do you have any videos of how the exhaust sounds with the cat deletes?
I will try to get some.
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Old 07-31-2020, 11:12 AM   #5
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Quote:
Originally Posted by jaybee924 View Post
Do you have any videos of how the exhaust sounds with the cat deletes?
CA primary cat deletes with factory NPP from the secondary cats back.

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Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP
Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA
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Old 08-08-2020, 09:09 PM   #6
cmitchell17

 
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It doesn't look like I am going to have any luck finding stock cats, so I'd be willing to sell these straight up for $300. They are brand new I only had them on for a day and took them off. They don't come with mounting studs for the transmission bracing part and the passenger side flange but I will include the bolts and nuts I bought. I left the header collector gasket on these too, but keep in mind the gasket is a supposedly one time use only deal, they are about $12 a piece at the dealer for new ones. Thanks.
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Old 08-09-2020, 09:44 AM   #7
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I don't know why you don't just run them and add some resonators.
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Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP
Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA
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Old 08-09-2020, 12:08 PM   #8
cmitchell17

 
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I don't know why you don't just run them and add some resonators.
I would still have to get them welded in, and I thought they were called resonators because they were tuned to eliminate drone at a certain frequency, but the rasp and noise isn't at a specific RPM. Apparently people say the thinner stainless doesn't make a difference in sound, I just know when I put the delete pipes on I heard way more rasp and noise especially coming through the firewall.

My only guess is the double wall of the stock downpipes and headers help to attenuate noise. I believe there main reason for the double wall is to insulate the pipes for faster cat warmup during cold starts but maybe it helps with sound too.
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Old 08-10-2020, 11:23 AM   #9
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Resonators are not just for drone...they tone down the entire exhaust note.

Only thing I notice with my CA pipes is I can hear the "fuel tick" similar to LT headers on cold start. I do agree cat deletes make the stock NPP muffler "tinny" sounding which is why I ended up doing a axle back. I am sure your large cam amplifies these noises.
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Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP
Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA
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Old 08-23-2020, 08:45 AM   #10
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PM sent
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Old 08-23-2020, 09:53 AM   #11
cmitchell17

 
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PM sent
I never got a PM from you?
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Old 08-24-2020, 09:05 AM   #12
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He sent the PM to the wrong guy.
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Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP
Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA
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Old 09-17-2020, 07:14 PM   #13
CHEM2010
 
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delete pipes

Do you still have delete pipes for sale?
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Old 09-17-2020, 08:50 PM   #14
cmitchell17

 
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Do you still have delete pipes for sale?
Yes, I still got them.
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