Gutted both primary and secondary stock cats

Tcamaro · 04-10-2017, 09:24 PM

Has anybody just gutted both primary and secondary cats? I'm getting ready to install the ESC vortex along with a hp tuner tune by them to start with. Besides just turning off the secondary O2's what else is needed? Can I remove the secondary o2 sensors and install the wb I plan using to tune or is there something else it will cause by physically removing them? CA sells there cat delete for the primary for $399 and it looks I'll have to also cut and remove the secondary cats and install pipe for them. Why not just gut and leave in place? A little labor will save $500 plus and maintain the stock appearance.

ULTRAZLS1 · 04-10-2017, 09:27 PM

Most people don't gut the stock cats cuz they are valuable. Depending on size/style and scrap prices they can go for up to hundreds each.

Blk16SS · 04-10-2017, 09:49 PM

Quote:

Originally Posted by Tcamaro

Has anybody just gutted both primary and secondary cats? I'm getting ready to install the ESC vortex along with a hp tuner tune by them to start with. Besides just turning off the secondary O2's what else is needed? Can I remove the secondary o2 sensors and install the wb I plan using to tune or is there something else it will cause by physically removing them? CA sells there cat delete for the primary for $399 and it looks I'll have to also cut and remove the secondary cats and install pipe for them. Why not just gut and leave in place? A little labor will save $500 plus and maintain the stock appearance.

I gutted my front cats (easy) and cut the rears off....

Atomic Ed · 04-11-2017, 09:39 AM

Any particular reason you're doing this? Not much power to be gained; maybe 10rwhp. The stock exhaust is capable up to 750ish rwhp.

Megahurtz · 04-11-2017, 10:05 AM

Quote:

Originally Posted by Atomic Ed

Any particular reason you're doing this? Not much power to be gained; maybe 10rwhp. The stock exhaust is capable up to 750ish rwhp.

750rwhp might be pushing it.....

Tcamaro · 04-13-2017, 08:10 PM

Quote:

Originally Posted by Atomic Ed

Any particular reason you're doing this? Not much power to be gained; maybe 10rwhp. The stock exhaust is capable up to 750ish rwhp.

I will be installing vortec soon.

YoungFamous · 12-11-2019, 05:32 AM

Quote:

Originally Posted by Blk16SS

I gutted my front cats (easy) and cut the rears off....

Does a light come on after gutting?

TJay74 · 12-11-2019, 09:07 AM

Gutting both sets of cats will gain 10-15 to the wheels, well worth it to some. You will need to turn off about 20-26 codes for the rear O2 sensors so they dont trip the light. Make sure you flash the tune 1st before you fire up the car without the rear cats in place otherwise it could possibly still trip the code.

You may also need to clean the WOT tune up as well as the reduced back pressure will change the the A/F for the WOT part of the map.

JCunningham · 12-13-2019, 03:17 AM

usually when you gut cats the exhaust sounds like crap. never heard of anyone doing it on a modern Camaro. that's usually a high school mod so dont know what its going to sound like. not worth the risk. The scrap yard offered me $150 for the 2 cats off my 5th gen. didnt bother taking the 6th gens in.

6spdhyperblue · 12-13-2019, 06:37 AM

Gutting loses power. Flows like turbulent crap.

DorkMissile · 12-18-2019, 12:15 PM

I have CA Primary deletes and gutted secondaries - I get a lot of compliments on the sound

Didn’t do it for sound, switched to E85 & Meth Injection, was going to be an issue down the road if left in place (clogging)

Vrodviddy · 12-18-2019, 01:31 PM

I deleted my cats and get complements all the time on how my car sounds. She puts 520 to the ground. If you do it, i wouldn't use her as a daily driver. The gas smell can be a bit much. Personally i like it, adds that extra feeling of race car. Loud as F*&k.

04-10-2017, 09:24 PM	#1
Tcamaro Drives: 16' 2SS Join Date: Jul 2016 Location: Frankfort Posts: 80	Gutted both primary and secondary stock cats Has anybody just gutted both primary and secondary cats? I'm getting ready to install the ESC vortex along with a hp tuner tune by them to start with. Besides just turning off the secondary O2's what else is needed? Can I remove the secondary o2 sensors and install the wb I plan using to tune or is there something else it will cause by physically removing them? CA sells there cat delete for the primary for $399 and it looks I'll have to also cut and remove the secondary cats and install pipe for them. Why not just gut and leave in place? A little labor will save $500 plus and maintain the stock appearance.

12-11-2019, 09:07 AM	#8
TJay74 Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016 Location: Norman, OK Posts: 2,424	Gutting both sets of cats will gain 10-15 to the wheels, well worth it to some. You will need to turn off about 20-26 codes for the rear O2 sensors so they dont trip the light. Make sure you flash the tune 1st before you fire up the car without the rear cats in place otherwise it could possibly still trip the code. You may also need to clean the WOT tune up as well as the reduced back pressure will change the the A/F for the WOT part of the map. __________________ 2019 Corvette Z06 2LZ A8 - Halltech CAI, AWE non-catted X-pipe, Mamo V2 ported TB 592rwhp, bone stock 566rwhp 2017 Camaro SS 1LE - Procharger D1SC w/ Tial 2" BOV & Race intercooler / ARH full length catless headers / Alky meth injection system - 650rwhp on conservative tune SOLD

12-13-2019, 03:17 AM	#9
JCunningham Drives: 2017 2SS M6 Join Date: Jun 2013 Location: WNY Posts: 7,070	usually when you gut cats the exhaust sounds like crap. never heard of anyone doing it on a modern Camaro. that's usually a high school mod so dont know what its going to sound like. not worth the risk. The scrap yard offered me $150 for the 2 cats off my 5th gen. didnt bother taking the 6th gens in. __________________ real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1

12-13-2019, 06:37 AM	#10
6spdhyperblue Drives: 6th gen Join Date: Aug 2013 Location: US Posts: 3,675	Gutting loses power. Flows like turbulent crap. __________________ ‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122 ‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold)

12-18-2019, 12:15 PM	#11
DorkMissile Drives: 18 1SS 1LE HyperBlue Join Date: Aug 2018 Location: Twin Cities, MN Posts: 612	I have CA Primary deletes and gutted secondaries - I get a lot of compliments on the sound Didn’t do it for sound, switched to E85 & Meth Injection, was going to be an issue down the road if left in place (clogging) __________________ 2018 1SS 1LE / HBM - ECS Novi 1500 S/C Tuned by Carl @ CJ Tunes

04-10-2017, 09:27 PM	#2
ULTRAZLS1 Drives: 14 Silverado LTZ Z71, 16 Camaro SS Join Date: Nov 2009 Location: Jackson, Michigan Posts: 4,407	Most people don't gut the stock cats cuz they are valuable. Depending on size/style and scrap prices they can go for up to hundreds each.

04-11-2017, 09:39 AM	#4
Atomic Ed Drives: 2001 Audi TT, 2016 Camaro Join Date: May 2016 Location: Eastern Washington Posts: 833	Any particular reason you're doing this? Not much power to be gained; maybe 10rwhp. The stock exhaust is capable up to 750ish rwhp.

12-18-2019, 01:31 PM	#12
Vrodviddy Drives: 2018 Camaro ss Join Date: Jul 2019 Location: North Atlanta, Ga. Posts: 147	I deleted my cats and get complements all the time on how my car sounds. She puts 520 to the ground. If you do it, i wouldn't use her as a daily driver. The gas smell can be a bit much. Personally i like it, adds that extra feeling of race car. Loud as F*&k.

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