04-14-2016, 04:48 PM | #1 |
Drives: 2016 1SS, 2017 JKU Wrangler Join Date: Mar 2016
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Secondary Cat Delete
Seriously considering having a muffler shop cut out and weld in a straight pipe in place of the secondary cats. I've seen a thread regarding primary cat delete but couldnt find any concrete information regarding removing ONLY the secondary cats.
Has anyone done this? Not expecting any gains, mostly looking for sound.
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SLO 1SS - sold
1SS MRC NPP 6MT 2018 Ram Rebel 4x4 5.7 |
04-14-2016, 04:52 PM | #2 |
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Steve
Hyper Blue 2SS, 6M, NPP, Sunroof, Nav |
04-14-2016, 04:55 PM | #3 |
Retired from Car mfrs....
Drives: 2LT RS/HR-V Join Date: May 2013
Location: /Fort Lauderdale
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Pm tr6 - he has done it on a 2ss....
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04-14-2016, 05:02 PM | #4 | |
Lethal Camaro
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Quote:
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04-14-2016, 05:36 PM | #5 |
マスタング = 遅い
Drives: 2017 Chevrolet Camaro SS 1LE Join Date: Aug 2015
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04-14-2016, 06:17 PM | #6 | |
Drives: 2016 1SS, 2017 JKU Wrangler Join Date: Mar 2016
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Quote:
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SLO 1SS - sold
1SS MRC NPP 6MT 2018 Ram Rebel 4x4 5.7 |
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12-07-2016, 04:08 PM | #7 |
Drives: 2016 Camaro 2SS Black on Black Join Date: Aug 2016
Location: Florida, Jacksonville/Lake City
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Do we have to have a tune when removing the secondary cats?
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12-07-2016, 04:22 PM | #8 |
Drives: 2016Camaro+1968Chevelle+1954BelAir Join Date: Feb 2013
Location: NH
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Ive had no issues. Order some 2 3/4" pipe, it was hard to find locally
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12-07-2016, 05:28 PM | #9 |
Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016
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No tuning needed, the secondary cats are not monitored.
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12-07-2016, 05:49 PM | #10 |
Drives: 2016 Camaro 2SS Black on Black Join Date: Aug 2016
Location: Florida, Jacksonville/Lake City
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12-07-2016, 05:59 PM | #11 |
Drives: 2010 camaro RS,2017 camaro 1Le Join Date: Mar 2016
Location: Charlotte, NC
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Should only be throwing a code if there is a leak. I.e. Bad welds or bad fitment
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2017 camaro 1le
ROTO fab, Ported MSD, Ported 95mm tb, 2in TSP catless longtubes, flowmaster x-pipe, flowmaster American thunder npp, flex fuel, |
12-07-2016, 06:03 PM | #12 |
There are some that claim a loss of torque too... I have not done it but want to.
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12-07-2016, 09:16 PM | #13 |
Drives: 2016 mosaic black 2ss ash int A8 Join Date: Oct 2016
Location: Ft Riley, KS
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I just got mine deleted this afternoon. Granted I have not had long to drive and it's winter so I couldn't go WOT just give it 3/4 throttle for a ramp up to highway speed. No CEL on mine. Slightly louder and a little more gurgle on downshifts or if at a high RPM and just let off the gas and let the RPMs fall while holding a gear. During regular auto mode I don't hear that much of a difference around town. If I had to pick a unscientific arbitrary sound gain I would say 10 percent louder. I would imagine the M6 guys would get more enjoyment due to they can drive the way I was mentioning easier. There is zero change in volume with the NPP valves doing their job at cruise. Overall I'm happy with it. My local muffler shop charged me 60 dollars and the car was done in 30 min or so. At the end of the day it sure beats the prices for a pre made pipe plus the added cost for AFM valves in my case. Also there's no perceived loss of torque but no increase in felt power. I did not expect any loss or gain. I honestly think those negitive claims are in their head. You will have a bigger power difference based on weather and operating conditions than this mod. All of these are my opinions not facts.
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02-20-2017, 07:49 PM | #14 | |
Drives: 2017 Hyper Blue 1LE Join Date: Dec 2016
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