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Old 01-27-2016, 08:26 PM   #1
Imtheboss
 
Drives: White 1lt sunroof NPP
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Location: Los Angeles
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Cat delete on NPP

I want to take the cats off for added sound on a v6, is there anything I should know before doing it, and would it have any negative affect on the npp system?
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Old 01-27-2016, 09:00 PM   #2
CAPerformance16
 
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It will throw a CEL for the missing cats, but that can easily be tuned out. As far as the NPP it will work as normal, just alittle louder.
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Old 01-27-2016, 09:30 PM   #3
BahamaTodd

 
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Cat delete in California? Good luck...
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Old 01-27-2016, 09:33 PM   #4
laynlo15
 
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Not a good idea in Cali. Could cause other issues also. Should of had a V8.
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Old 01-27-2016, 09:35 PM   #5
CAPerformance16
 
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Quote:
Originally Posted by BahamaTodd View Post
Cat delete in California? Good luck...
No smog inspection for 5 years when new and even then nothing knowing a few people can't fix. Just don't act a fool and get ref'd. I daily drove a 650rw Turbo 4th Gen SS with dumped exhaust and never once had an issue.
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2016 1SS A8
7.9 @ 90.79 Stock with a tire
7.20 @ 94.71 LBO getting kicked out
Now tuned on E85, CA Performance Test pipes & Circle 4C 3800 stall shooting for low 7's next time out.
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Old 01-28-2016, 04:20 AM   #6
Imtheboss
 
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Thanks for all the great advice, also would a high flow cat be able to get the job done?
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Old 04-21-2016, 09:04 PM   #7
Eljefe619
 
Drives: Black on black 2ss
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So I did the the cat delete on a 2ss and cut out the 2nd cats also there were no cel at all. The car is loud a Lil raspy in the rpm range but sounds good lost a bit of bottom end.

https://youtu.be/J7F0Quf2JUk
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Old 04-22-2016, 08:08 AM   #8
Lucely Engineered
 
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Quote:
Originally Posted by Eljefe619 View Post
So I did the the cat delete on a 2ss and cut out the 2nd cats also there were no cel at all. The car is loud a Lil raspy in the rpm range but sounds good lost a bit of bottom end.

https://youtu.be/J7F0Quf2JUk
Camaro*
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Old 04-22-2016, 08:10 AM   #9
Glen e
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You can elim 2nd cats no problem. Makes a diff ....search for my post with pics here....
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Old 05-18-2016, 12:48 PM   #10
ScottySheppard
 
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Quote:
Originally Posted by Glen e View Post
You can elim 2nd cats no problem. Makes a diff ....search for my post with pics here....
Did a quick check with a lot of the muffler shops in my area (Reno/Carson City) and nobody will touch the job. All say it's a $2500 fine (nationally) if they get caught doing it. Any suggestions?
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11/30/15--1100
12/10/15--2000
12/16/15--3000
01/06/16--3300
01/07/16--3400
01/25/16--3800 1G1FC1RS8G0142935
01/25/16--4000
01/27/16--4B00
02/06-16--4300
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Old 05-31-2016, 03:29 PM   #11
ScottySheppard
 
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Found several hot rod shops that will do it. I guess you need to use a 2 3/4" stainless pipe or it might through a code. Anyone confirm?
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2016 Camaro 2LT, RS, Hyper Blue, Med Ash Gray, Silver Rally Stripes, Advanti DST Titanum Mirror Wheels, LGX, 6M, IO6, NPP, ZN2

11/30/15--1100
12/10/15--2000
12/16/15--3000
01/06/16--3300
01/07/16--3400
01/25/16--3800 1G1FC1RS8G0142935
01/25/16--4000
01/27/16--4B00
02/06-16--4300
02/22/16--6000
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