10-17-2023, 08:52 AM | #1 |
Drives: 2023 2SS 1LE Camaro Join Date: Aug 2023
Location: ON
Posts: 12
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2023 SS 1LE Secondary Cat Delete
Has anyone had issues at all after a secondary cat delete (resonator) ? I am about to get mine removed and I just wanted to see if anyone had issues. I know it shouldn't throw a code as they are downstream of any O2 sensor. I just want to make the car a little louder but maintain the use of the NPP valves and this seemed like the easiest way.
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10-17-2023, 09:05 AM | #2 |
Drives: 23 ZL1 A10 Rapid Blue Join Date: Aug 2020
Location: MO
Posts: 1,992
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Its known to not have any issues like codes and such.
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10-17-2023, 09:12 AM | #3 | |
Drives: 2024 Black ZL1, M6 Join Date: Mar 2014
Location: Murrieta, CA
Posts: 324
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Quote:
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10-17-2023, 11:23 AM | #4 |
Drives: 2022 Camaro LT1 A10 Join Date: Nov 2015
Location: new england
Posts: 373
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Through my research I have found nobody with codes from doing that. I'm actually thinking about doing that too.
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2022 Camaro LT1 A10 - Drag Pack/AxleBack -11.849@118.67MPH/1.798 60' 2001 Camaro SS A4 - HCI/Stall/Bolt-on/Gear/Tune/DR/Diet - 429HP/392TQ - 10.99@123.58MPH/1.584 60' 1998 Camaro Z28 A4 - Bolt-on 1999 Camaro Z28 A4 - Stock FJB |
10-17-2023, 01:16 PM | #5 |
Drives: 2023 2SS 1LE Camaro Join Date: Aug 2023
Location: ON
Posts: 12
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Seems like a cheap easy way to get a little better sound. I found an X pipe meant to delete them but it seems like a ton of money in comparison to getting someone to just weld a piece in-between.
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10-17-2023, 01:40 PM | #6 |
Drives: 2017 1SS 6spd Join Date: Jan 2011
Location: Utah
Posts: 2,869
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For a short time Borla made the part #60606 available to achieve a 2nd cat delete and improved X-pipe bolt on as an inexpensive alternative to a full exhaust system change. At that time, I think it was about $600 for the X-pipe vs. $2-3K for a full system.
I was fortunate to grab one and in some early exhaust discussion told the folks here on C6 to "get one while you can". I've heard there is another perf. exhaust company offering a similar part and all I can tell you is I'm still thrilled with the result of my Borla combined with the NPP exhaust option. In Track mode it is plenty loud enuff for me and when I visited my son in California, I made sure not to draw too much attention for fear of some kind of punitive action by that state's police! Probably no performance improvement, but it sounds great IMHO. Also, no CEL's or drivability issues with this mod. |
10-17-2023, 06:03 PM | #7 | ||
Drives: 2022 Camaro LT1 A10 Join Date: Nov 2015
Location: new england
Posts: 373
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Quote:
But IDK if I can make it that long! I'm curious, which one are you looking at? Quote:
I heard quite a few people say the secondary delete does't do much for sound. You say it does?
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2022 Camaro LT1 A10 - Drag Pack/AxleBack -11.849@118.67MPH/1.798 60' 2001 Camaro SS A4 - HCI/Stall/Bolt-on/Gear/Tune/DR/Diet - 429HP/392TQ - 10.99@123.58MPH/1.584 60' 1998 Camaro Z28 A4 - Bolt-on 1999 Camaro Z28 A4 - Stock FJB |
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10-17-2023, 10:18 PM | #8 |
Drives: 2017 1SS 6spd Join Date: Jan 2011
Location: Utah
Posts: 2,869
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Yes, even though the secondary are smaller, it's still a cat with like 600 channels or cells per square inch (I am totally blowing smoke here! I can't remember what a factory spec cat has!). That does a little muffling. That's why some Camaro owners prefer to just run a straight pipe behind their cats. After passing thru both cats, it's not THAT loud IMHO of course.
But the primary cats with a NPP option works well for me. |
10-18-2023, 07:53 AM | #9 |
Drives: 2020 Camaro 2SS A10 Join Date: Jun 2018
Location: Michigan
Posts: 1,382
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Speed Engineering $250 + install cost. I guess it might be considered a ton of money, but seeing as I'm a broke joke and not mechanically inclined it was an easy decision.
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2020 Camaro 2SS A10 | Rebuilt by: CBI Street Cars | 2" SE LT Headers | 3" SE X-Pipe | 3" MBRP Axle-Back | Pri & Sec Cat Deletes | K&N Typhoon CAI | LT2 Ported | 95mm ZR1 TB | DOD Delete | BTR Stage I Cam | ECM, TCM & E85 |Tuned by: Shane Hinds | Dyno: 510 rwhp 472 rwtq
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10-18-2023, 03:33 PM | #10 |
Drives: 2023 2SS 1LE Camaro Join Date: Aug 2023
Location: ON
Posts: 12
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10-18-2023, 05:04 PM | #11 |
Drives: 2019 zl1 6 speed Join Date: Jul 2017
Location: Lake Havasu Arizona
Posts: 979
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I had one on my 17 2ss and now have one on my 19 zl1, both going to sw axleback. It was definitely louder on the ss than with the cats, not huge but very noticeable. It was louder with a higher pitch. On the zl1, I feel, it made more of a difference, still nothing huge like adding an axleback, but more than the past one. Once again, it gave a little higher pitch but when downshifting it sounds really good, I can only describe it as "barking sound", not like a dog, lol. I believe you gain 2.5-5 hp for loosing the secondary cats, as they are still a restriction. Deleting main cats is about 15hp, pls someone correct me if I'm wrong, been a while. I used the borla ones, the speed engineering ones have fitment issues if I remember correctly, and have to remove or change out a lower brace due to clearance. Best bet nowadays, is to try and find a shop to do it, which could be tough. Ive heard if you take them out yourself, then take it to a shop, they can install it, because it wasn't in the car and they aren't removing anything, aounds risky, though, lol. You could also cut them out, beat out the core so it's more free flowing, and use some vibrant exhaust clamps to seal it up with no leaks. Bonus, it looks factory and won't mess with inspections. I think they test for carbon dioxide, among others, but secondary cats are for carbon monoxide, which you should be able to pass with.
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10-19-2023, 07:04 AM | #12 | |
Drives: 2023 2SS 1LE Camaro Join Date: Aug 2023
Location: ON
Posts: 12
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Quote:
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10-19-2023, 07:33 AM | #13 |
RedLine
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I've deleted the secondary cats on both my ZL1 1LE's (2018 & 2022) I have owned. You get a slightly louder tone, No drone, quite a bit more crackle on de acceleration, and no real noticeable difference in fumes.
I deleted both cats on my 13 ZL1 and on my 18 CTS-V. You get a much louder tone, still no drone, lots of crackling pop, however you'll definitely notice the exhaust smell. Depending on what else you have done you may even get some flames pop out the tailpipes on de acceleration when you delete both cats. (obviously requires a tune to keep the check engine light off) As far as horsepower I don't believe you get anything from deleting the rears. Fronts may give you 5 to 10 horsepower without a tune.
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2018 GMC 2500 "Blue" (Sold)
2018 ZL1 1LE Hyper Blue" (Sold) 2018 CTS-V "Black" (Sold) 2022 GMC 2500 "Blue" 2022 ZL1 1LE 6spd "Rapid Blue" 2023 ZL1 1LE Auto Rapid Blue (ordered) Last edited by tomster; 10-19-2023 at 07:51 AM. |
10-19-2023, 07:37 AM | #14 |
RedLine
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Speed engineering is the only company I know of currently making the secondary cat delete /x pipe. The only problem I had was getting it to tuck up high enough to go over the tunnel brace. I ended up buying a tunnel cross brace that has a little drop in it from Halo..
https://speed-engineering.com/collec...16-6-2l-engine https://www.phastekperformance.com/H...halo-cdtg6.htm
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2018 GMC 2500 "Blue" (Sold)
2018 ZL1 1LE Hyper Blue" (Sold) 2018 CTS-V "Black" (Sold) 2022 GMC 2500 "Blue" 2022 ZL1 1LE 6spd "Rapid Blue" 2023 ZL1 1LE Auto Rapid Blue (ordered) |
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