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03-07-2017, 12:18 PM
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#1 |
 
Drives: 2SS 6Spd 50th Anniv Join Date: Feb 2017
Location: Shorewood IL
Posts: 3
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Who has bolt in cat deletes with NPP?
Been reading all kinds of exhaust threads over the last couple days and finding all kinds of good info, but wondering if anyone has bolt in cat deletes with the NPP and how it sounds? Anyone tried the old spark plug non fouler trick for the rear 02's?
Thanks! |
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03-07-2017, 07:49 PM
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#2 |
Drives: 2016 Camaro SS Join Date: Oct 2016
Location: Mount Dora, FL
Posts: 792
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I ran that for quite a while. You will get a little bit of rasp on RPM transitions when up shifting. It will be much louder overall.
There is no tricking the rear O2s. A tune is needed. Tim |
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03-08-2017, 07:37 AM
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#3 |
        Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016
Location: Norman, OK
Posts: 2,424
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Also there is no "bolt in" anything on this system. The stock system is fully welded from to rear other than the junction to the primary cats. I had my secondary cats cut out yesterday and so far with around 100 miles on the new setup it is pretty nice.
The tone is louder, more aggressive, and I can tell some power has came along with it as well. |
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03-08-2017, 07:40 AM
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#4 |
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Drives: 2016 Camaro SS Join Date: Oct 2016
Location: Mount Dora, FL
Posts: 792
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Primary cat delete is bolt on.
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03-08-2017, 07:44 AM
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#5 |
Drives: 2011 2SS/RS & 2017 1SS Join Date: Apr 2011
Location: Maryland
Posts: 1,960
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Op...I am running exactly what you are talking about. As mentioned it is a tad bit raspy at high RPMs, but sounds pretty good for right now. I do not think it is loud by no means tho. I have the NPP fuse pulled as well. Loud is a relative thing from person to person, now my 5th Gen is LOUD. LOL. This 6th gen is pretty tame even at WOT IMHO.
As far as rear o2 sensors are concerned, I used HPT to tune them out.
__________________
2011 Chevrolet Camaro 2SS/RS L99 (1 of 782)
10.78 @125mph ALL MOTOR SBE Built/Tuned by Me 2017 Chevrolet Camaro 1SS Auto 9.29 @144.57mph ALL MOTOR SBE #TEAMGPI Gwatney Performance Innovation |
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03-08-2017, 09:15 AM
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#6 | |
Drives: SS-6-SPD Join Date: Jan 2017
Location: New Jersey
Posts: 1,364
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i have my secondary cat delete with NPP exhaust.
Last edited by cmeJATT; 03-08-2017 at 10:19 AM. |
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03-08-2017, 09:59 AM
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#7 |
Drives: 2019 ZL-1 Join Date: Feb 2009
Location: Troy, MI & Naples, FL
Posts: 2,019
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Nice- except its NPP........ :-)
__________________
2019 ZL-1 Acquired 4/23/21 at 6300 miles. Riverside Blue, A10, PDR. Traded in 2017 2SS with 6M and 32k miles. Continental Extreme Contact Sports. Now has 10,000 miles...
2012 Yukon XL Denali w/ 6.2 AWD |
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03-08-2017, 10:19 AM
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#8 | |
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Drives: SS-6-SPD Join Date: Jan 2017
Location: New Jersey
Posts: 1,364
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Quote:
 i meant to say NPP lmao
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03-08-2017, 10:23 AM
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#9 | |
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Drives: 2019 ZL-1 Join Date: Feb 2009
Location: Troy, MI & Naples, FL
Posts: 2,019
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Quote:
__________________
2019 ZL-1 Acquired 4/23/21 at 6300 miles. Riverside Blue, A10, PDR. Traded in 2017 2SS with 6M and 32k miles. Continental Extreme Contact Sports. Now has 10,000 miles...
2012 Yukon XL Denali w/ 6.2 AWD |
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