02-27-2019, 11:44 AM | #1 |
Drives: Garnet Red / ZL1 1LE Join Date: Apr 2016
Location: Bel Air, MD
Posts: 488
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Subjective - Best Exhaust Set up Incl. NPP with no drone
All,
I am trying to find the sweet spot with regard to in cabin sound experience and of course out of the tailpipes. What is the best exhaust setup (that does not include headers) that gives one an eargasm inside and outside the car that includes the following - - Stock NPP Axle back - No Interior Drone The headers route will most likely void my warranty which is a no go. Let's discuss. |
02-27-2019, 11:49 AM | #2 |
Drives: E92 BMW M3 Join Date: Oct 2012
Location: Houston
Posts: 4,496
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I think your only option, and what you're looking for, is to delete the secondary cats by installing an aftermarket mid-pipe like many have done with the Borla 6060(I think). I believe Corsa has one too.
There is a thread on this, retains warranty as secondary cats don't throw a code so no tune needed. Adds sounds, but nothing crazy and no drone has been reported yet. Good luck!
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SOLD - 2013 1LE - Pat G Spec'd Cam, NPP with 1 7/8" Long Tube Headers with High Flow Cats, Intake w/scoop, Ported Throttle Body, and Apex 1.25" Lowering Springs.
J-Rod Built and Matt@FSP Tuned |
02-27-2019, 11:54 AM | #3 | |
Drives: Garnet Red / ZL1 1LE Join Date: Apr 2016
Location: Bel Air, MD
Posts: 488
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Quote:
I hope it is worth it. |
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02-27-2019, 12:19 PM | #4 | |
Drives: 2017 Camaro ZL1 Join Date: Aug 2018
Location: Bel Air, MD
Posts: 319
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Quote:
I see you're in Bel Air, as am I. I'll be installing the Borla ATAK Catback (NPP) on my ZL1 second week of March. I'm keeping the secondary cats though. You're more than welcome to hear it to see if it's loud enough for you. |
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02-27-2019, 12:46 PM | #5 |
Drives: 17 SS 1LE Join Date: Dec 2015
Location: Houston
Posts: 1,920
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Borla and Flowmaster NPPs don't drone w/ valves closed. I like AFE too but don't know what it sounds like in quiet mode.
Removing secondary cats will make the sound more raspy, I wouldn't do it without adding a resonator. |
02-27-2019, 12:52 PM | #6 |
Flyin NOE
Drives: 2018 ZL1 (A10) Join Date: Apr 2017
Location: TX
Posts: 949
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I ran a Borla 60606 (secondary cat delete w/x-pipe) from stock exhaust to OEM muffler. There was some drone and it was too raspy for me. So, I included the Borla 60608 (resonator) which eliminated the drone and rasp and made the exhaust a little deeper.
Overall, a little louder than stock and a deeper note. |
02-27-2019, 01:09 PM | #7 |
Drives: Gen V Viper GTS Join Date: Jan 2018
Location: SoCal
Posts: 260
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Borla S Type--retain primary and secondary cats. Awesome sound, no drone, and keep NPP Valves.
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02-28-2019, 07:31 AM | #8 |
Drives: 18 ZL1-1LE, 10 JKU Join Date: Jul 2018
Location: AR
Posts: 584
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Just finished a stainless works catback last night, but didn’t get to drive. It retains valves, but i have no idea about drone yet...I’d venture to guess little to none, but will know soon.
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02-28-2019, 08:09 AM | #9 |
Drives: '19 ZL1 1LE Join Date: Feb 2019
Location: DFW, TX
Posts: 127
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Flowmaster American Thunder w/NPP catback here (retained secondary cats). Deep, aggressive tone, slightly louder than stock, no drone even with the fuse pulled at highway speeds. Next step is going to be a secondary cat delete.
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02-28-2019, 12:40 PM | #10 |
Drives: 2018 zl1,A10,16 GLC300 Join Date: Jul 2017
Location: Cypress,Tx
Posts: 163
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+1, same system, love it!
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2018 ABM,A10
Kooks 2” headers no cats, NW 103 Tb, Kong ported blower with 2.31 pully, Elite E2x catch can, Cordes under hood expansion tank, Flowmaster axle back, Rotofab dry filter,Mustang Dyno # 647whp/674wtq. |
02-28-2019, 12:52 PM | #11 |
Owning SSes for 50 Years
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I am buying a low mileage used set of these SW axlebacks with NPP and wondering what they sound like. You probably are eliminating any resonator that might be OEM and the crunched convertible over the axle pipe. I look forward to your experience.
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The new ride: 2023 Camaro, LT1, Sharkskin Grey
Previous Performance Cars: 1966 Chevelle SS 4M, 2010 Corvette 6M 1968 Dodge Charger R/T Auto 2012 1SS 6M 1982 Corvette Auto 2010 1SS 6A 1984 Corvette Auto 2016 2SS 8A 1999 Camaro Auto 2017 HBM 1SS 1le 2002 C5 Corvette 6M 2018 2SS 2006 Corvette Auto 2023 Camaro LT1 |
02-28-2019, 01:10 PM | #12 |
Drives: 18 ZL1-1LE, 10 JKU Join Date: Jul 2018
Location: AR
Posts: 584
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i only have one little clip testing the valves, I'd had the fuse out for awhile and just wanted to make sure we were completely done before i pulled it off the lift. i will likely make a thread when i can get some more video and experience, but if you want what i have now just lemme know.
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02-28-2019, 01:30 PM | #13 |
Drives: 2017 ZL1 Convertible A10 Join Date: Aug 2017
Location: San Gabriel, CA
Posts: 992
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Hey Baltimore guys, it's not time for you to come out and play yet... get that car back in the garage until late April
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'17 White ZL1 A10 Convertible - TM ported TB - RotoFab CAI - 2.3" griptech upper pulley - Kooks 1 7/8" Headers with High Flow Cats - Borla S-type Catback - Audio Overhaul - NavTV M650-GM - 20" BlackDiForza- Michelin Pilot Sport4S - Tuned at BRC Raceworks (606rwhp/675trq)
'14 CTS-V Coupe - ZL1 lid - Ported TB - Ported Snout - AirRad CAI - 8.66" lower - 2.55" upper- Greenbelt - SW Headers - SW Catback - Varimax Intercooler Pump - Track Attack Intercooler-Tuned at BRC Raceworks (551rwhp/516trq) '17 Maserati Levante- STOCK |
03-01-2019, 12:52 PM | #14 |
Drives: 2017 Camaro ZL1 Join Date: Aug 2018
Location: Bel Air, MD
Posts: 319
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