08-07-2020, 09:48 AM | #1 |
lost between two shores
Drives: 2020 SS 1LE Join Date: Apr 2018
Location: North Texas
Posts: 138
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Secondary Cat Delete Picture Book
Had the secondary cats deleted this morning and it's quiet louder...see what I did there?
Sorry for the cheesy joke, but it really is the best of both worlds - it's louder where you want it (start-up, decel pops, accelerating, revving) and quiet when you need it (highway cruising, no drone, talking on phone or to passenger, listening to news, etc.). Definitely worth the $125.
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08-07-2020, 09:57 AM | #2 |
Drives: 2017 2SS F1FTY Join Date: Feb 2020
Location: Fort Wayne, IN
Posts: 348
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Great pics and thanks for sharing. You took it to your local muffler shop and it was $125? Seems like a nice cheap mod for more sound. You have no other mods done to the exhaust/air? Did the tone change or is just a bit louder?
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08-07-2020, 10:15 AM | #3 | |
lost between two shores
Drives: 2020 SS 1LE Join Date: Apr 2018
Location: North Texas
Posts: 138
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Quote:
No other mods, and can't tell tone changed, just turned the volume dial up a few numbers from the factory exhaust.
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08-07-2020, 10:20 AM | #4 | |
Drives: 2017 2SS F1FTY Join Date: Feb 2020
Location: Fort Wayne, IN
Posts: 348
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Quote:
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08-07-2020, 10:20 AM | #5 |
Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016
Location: Ocean City, NJ
Posts: 3,226
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Nice photo essay.
Your tires are veering toward slicks like mine! |
08-07-2020, 10:46 AM | #6 |
Drives: 2019 Camaro 1LT 3.6 v6 Join Date: Sep 2019
Location: PA
Posts: 32
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Can you pass inspection with these deleted? What about deleting resonators?
Thanks in advance! |
08-07-2020, 11:17 AM | #7 |
Petro-sexual
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Thanks to threads like these, I have been looking for methods to gut mine with minimal cutting of the OEM pipes and no welding. I live in CA (regrettably) so I want to keep OEM-appearance.
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08-07-2020, 11:28 AM | #8 | |
Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016
Location: Ocean City, NJ
Posts: 3,226
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Quote:
http://www.drivecleanpa.state.pa.us/...iladelphia.pdf NJ stopped doing this type of visual inspection years ago. Now it's just OBD hookup and if there are no codes you pass emissions. But they used to do a pretty thorough under-car check with mirrors, and they are mostly car guys so they knew what to look for. |
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08-07-2020, 12:28 PM | #9 |
lost between two shores
Drives: 2020 SS 1LE Join Date: Apr 2018
Location: North Texas
Posts: 138
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Just turned 11,000 miles, and just finished putting a plug in the right rear. New set of tires sitting in garage, but I'd like to get one good donut video before putting them on. LOL
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08-07-2020, 12:32 PM | #10 |
Drives: SS A8, NPP, Red Hot Join Date: Jan 2019
Location: Toledo, OH
Posts: 583
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I have not seen a pic of the inside of our cats, seems very restrictive, a lot more restrictive than my previous cars. No wonder it gets a lot louder.
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08-07-2020, 12:34 PM | #11 | |
lost between two shores
Drives: 2020 SS 1LE Join Date: Apr 2018
Location: North Texas
Posts: 138
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Quote:
For my county in TX it's just a OBD plug-in; I've never seen them look under a car. Since the secondary cats are not monitored, and as long as you don't have a leak on the welds sucking in cold air on the decel that would trigger the nearby O2 sensors, then you should be good. Mufflers reduce volume; resonators tune sound. No reason a deleted resonator would cause you to fail inspection.
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08-07-2020, 12:49 PM | #12 |
lost between two shores
Drives: 2020 SS 1LE Join Date: Apr 2018
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BTW, the secondary cats weigh-in at 5 lbs. each.
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08-07-2020, 03:43 PM | #13 |
L8ap3x
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08-07-2020, 04:01 PM | #14 |
lost between two shores
Drives: 2020 SS 1LE Join Date: Apr 2018
Location: North Texas
Posts: 138
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Front tires aren't too bad, but the backs are well into the red on the tire tread gauge. I drove it for the first time in the rain last week in NW Arkansas and if there was the slightest amount of standing water it was a major pucker-factor!
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