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Old 07-07-2018, 07:20 PM   #1
Chris Edwards
 
Drives: 2017 ZL1
Join Date: Jan 2018
Location: California
Posts: 165
Quietest No-Cat Exhaust Setup

What is the truly quietest no-cat exhaust setup? On the V2 CTS-V's guys will add long Magnaflow resonators inline and use the stock after-cat muffler system.

What is the solution for our cars?
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Old 07-07-2018, 08:06 PM   #2
Harry76
 
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Drives: 2018 ZL1 A10 Nightfall Gray
Join Date: Apr 2016
Location: Indiana
Posts: 114
I have ARH 2 inch headers, along with the catless X pipe to stock muffler, I love it, in Touring mode its as quiet as a buick, but hit the throttle and its a beast.
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Old 07-07-2018, 08:07 PM   #3
Jimabe
 
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Drives: 2018 Red ZL1
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Location: Spring grove IL
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Been asking same question. Assume you mean headers and no cats? I have that and had stock muffler but sounds like crap. It is quietest though. I put corsa on. Still loud as hell. Think I will try resonators.
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Old 07-07-2018, 08:39 PM   #4
Chris Edwards
 
Drives: 2017 ZL1
Join Date: Jan 2018
Location: California
Posts: 165
Quote:
Originally Posted by Jimabe View Post
Been asking same question. Assume you mean headers and no cats? I have that and had stock muffler but sounds like crap. It is quietest though. I put corsa on. Still loud as hell. Think I will try resonators.
Yes, headers and catless x-pipe. Even with stock muffler it is too loud and doesn't even sound great.
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Old 07-08-2018, 09:59 AM   #5
Indyblue98
2012 RS 2ss
 
Drives: 2018 ZL1 2012 2SS WhippleCharged
Join Date: Feb 2012
Location: Kansas
Posts: 414
2018 is still stock , so not sure if this will apply.

On my 2012 I have Supercharger , Headers no Cats and Corsa's , Was Loud and Raspy.
Added a MagnaFlow Resonated X Pipe .
Only reduced the Volume by a few DB's at Idle , but took the edge/raspy
tone away .
Can easily carry on a conversation while driving , if not over 40% throttle
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2018 ZL1 A10 and 2012 2SS RS Whipple-Corsa-RotoFab-ZL1 Diff 3.73 Pfadt ZL Stage 3 Suspension+

Last edited by Indyblue98; 07-08-2018 at 10:00 AM. Reason: Details
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