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04-24-2021, 01:39 AM
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#1 |
 Drives: Chevrolet Camaro ZL1 Join Date: Jan 2020
Location: California
Posts: 23
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Non ZL1 owners input
I have been trying to research removing the secondary cats on my Zl1 and I find that all the input is from non ZL1 camaro owners in the ZL1 FORUM, no disrespect intended, but they are too differant animals. Most of the comments said that after removing the secondarys that they are experiencing flat spots in torque between 1800 & 2400 RPMs and have slower 60 ft. times. I would like to get the opinion of ZL1 owners. Sort of like apples to apples. I would appreciate any help.
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04-24-2021, 02:38 AM
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#2 |
 Drives: '86 IROC-Z '18 ZL1 Join Date: Jul 2019
Location: Arizona
Posts: 734
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Are we talking just removing the secondary cats and keeping the rest of the exhaust stock? Having an axle back? Tune or no tune?
I personally have not removed cats yet as I still have alittle less than a year on my warranty. Once its up im going full exhaust / no cats / tune. |
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04-24-2021, 06:06 AM
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#3 |
Drives: '20 ZL1 M6 Join Date: Apr 2017
Location: FT. Lauderdale, FL
Posts: 717
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I did it on my ZL1. Absolutely no issues. Better sound.
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Mal
Ft. Lauderdale, FL '20 Camaro ZL1 M6 '22 Kawasaki ZX-14R |
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04-25-2021, 11:16 PM
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#4 |
Drives: 18 ZL1-1LE, 10 JKU Join Date: Jul 2018
Location: AR
Posts: 585
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my catback got rid of mine by default, no issues
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04-26-2021, 07:53 AM
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#5 |
   
Drives: 2019 Chevy Camaro ZL1 M6 Join Date: Jul 2019
Location: Sea level
Posts: 1,252
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I removed my ZL1 secondaries with performance link pipes and there are no flat spots in the torque curve.
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Kong Stage X Port, NW103, LPE HPFP, XDI +30 Injectors, ARH Headers, Flex Fuel, JMS Booster, AWE Touring, Elite E2-X CC. Stock heads, stock cam, stock pulleys: Tuned by KingLT1. 740whp Uncorrected on e50
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04-26-2021, 04:54 PM
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#6 |
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Drives: Chevrolet Camaro ZL1 Join Date: Jan 2020
Location: California
Posts: 23
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Deeper rumble
Thank you for your input.. I have a Flowmaster American Thunder axleback with NPP and a Flowmaster resonator delete scavenger X pipe. With the #51 fuse pulled. Sounds Awsome. I will delete the secondary cats to try and get a deeper rumble. My neighbors already hate me so it won't matter.. (old school street racer 73 yes old)
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