L99 Resonator? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Red2014SS · 08-13-2015, 05:43 PM

What exactly is the purpose of the L99's exhaust resonator? Is it meant to keep it quiet, or does it do something else? I know it weighs a lot. I am interested in getting an X-pipe to replace the resonator. Should I get a resonated X-pipe, or will any X-Pipe do the same job?

13BRM2SSRS · 08-13-2015, 07:20 PM

Resonator is there to quite down the exhaust note in 4 cyl mode due to AFM. I want to delete mine as well. I noticed Jegs has a resonator eliminator x pipe on sale for $79.99 which I thinking about getting.

CRF8 · 08-13-2015, 07:25 PM

Has anyone done this ? How much weight savings? How much louder? I have afm tuned out.

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Pro Stock John · 08-13-2015, 08:08 PM

It's designed to reduce resonance and drone in the car.

I had a Jegs x pipe in the recent past.

Demon War Horse · 08-13-2015, 08:38 PM

Had mine cut out and a custom X done in its place. Does drone though and unless you have a Range device or have AFM tuned out, the 4cyl mode sucks!

Camarodriver2 · 08-13-2015, 10:15 PM

Quote:

Originally Posted by Demon War Horse

Had mine cut out and a custom X done in its place. Does drone though and unless you have a Range device or have AFM tuned out, the 4cyl mode sucks!

To confirm...there would be no drone with the Range device when the stock resonator is replaced with an X pipe?

Apex Motorsports · 08-13-2015, 10:25 PM

Quote:

Originally Posted by Camarodriver2

To confirm...there would be no drone with the Range device when the stock resonator is replaced with an X pipe?

Not with the stock mufflers.

CRF8 · 08-13-2015, 10:36 PM

I have already replaced the mufflers with axleback so maybe I should leave this alone

dontlift19 · 08-13-2015, 10:44 PM

I have the factory manifolds and cats, replaced the resonator with an x pipe, and electric exhaust cutouts that bypass my mufflers and there's a little drone but it's so faint you barely notice it. It sounds awesome when you get on it too, more of high pitched exotic kind of sound. Forgot to mention I also have the range device.

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Demon War Horse · 08-14-2015, 06:29 AM

Quote:

Originally Posted by Demon War Horse

Had mine cut out and a custom X done in its place. Does drone though and unless you have a Range device or have AFM tuned out, the 4cyl mode sucks!

You will get drone regardless by removing the resonator without J-Pipes, however AFM is really nasty with the resonator removed.

AllBlackSS · 08-14-2015, 06:34 AM

Had mine cut out along with the mufflers too. So I'm running straight pipes from the cats back with an x pipe where the resonator used to be. As others have said, make sure to get a range device or get a tune that gets rid of AFM or it will sound like crap when AFM kicks in. Overall, it sounds awesome so do it you won't regret it!!!

Red2014SS · 08-14-2015, 08:38 AM

Thanks to everyone. I will be getting a regular, non-resonated x-pipe. Bye bye resonator and 40 extra lbs.

Badfinger · 08-14-2015, 06:09 PM

I have Kooks LT headers with Hi Flow cats, jeg's X pipe, GMPP mufflers, and Drone!

Everest · 08-17-2015, 12:53 PM

I have Kooks Lt's, high flow cats, deleted the Resonator, Borla S-Type exhaust and had Drone up the azz.

Installed solo J-Pipes and BAM drone was gone.

08-13-2015, 05:43 PM	#1
Red2014SS Drives: 2014 2SS/RS Camaro Join Date: Dec 2014 Location: Kentucky Posts: 2,421	L99 Resonator? What exactly is the purpose of the L99's exhaust resonator? Is it meant to keep it quiet, or does it do something else? I know it weighs a lot. I am interested in getting an X-pipe to replace the resonator. Should I get a resonated X-pipe, or will any X-Pipe do the same job? __________________ 2014 2SS/RS, L99, SW LTH w/HF Cats, GMPP Ex. Z/28 CAI, FR41s in PVD Black Chrome, Recaros, Pfadt Sway 377hp, 383tq 12.739@110.44 MPH

08-13-2015, 07:20 PM	#2
13BRM2SSRS Drives: 13 Camaro 2SS Vert L99 Join Date: Jul 2014 Location: Florida Posts: 632 View My Garage	Resonator is there to quite down the exhaust note in 4 cyl mode due to AFM. I want to delete mine as well. I noticed Jegs has a resonator eliminator x pipe on sale for $79.99 which I thinking about getting. __________________ Black GFX / Dynatech Supermaxx LT Headers / FR Black Chrome ZL1 Replicas 275/315 / RDP Tune / CAI / VMAX TB / MBRP SS Catback / Gtechniq CSL & EXOV3 / VTC / RX Catch Can / Valentine 1 / Halo DRL / LED Fogs

08-13-2015, 07:25 PM	#3
CRF8 Scenic City Camaro Drives: 2022 Camaro ZL-1 /1974 Firebird 400 Join Date: Jan 2014 Location: Chattanooga TN Posts: 578 View My Garage	Has anyone done this ? How much weight savings? How much louder? I have afm tuned out. Sent from my iPhone using Tapatalk __________________ 2022 Camaro ZL-1, grey 1974 Firebird Formula 400, white https://www.facebook.com/groups/Camaro/ https://www.facebook.com/CRFinTN/?modal=admin_todo_tour

08-13-2015, 08:08 PM	#4
Pro Stock John Writer Drives: 2010 SS / 1967 Camaro Join Date: May 2009 Location: Chicago, IL Posts: 7,216	It's designed to reduce resonance and drone in the car. I had a Jegs x pipe in the recent past. __________________ PROJECT HEAVY CHEVY Camaro Now: Mods for the Masses Part I \| Part II 13.15@106 1.95 \| 100% Stock 12.37@112 1.85 \| + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune 12.06@113 1.70 \| + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune 11.84@115 1.59 \| + 3.91s + Race Star 17x7 Fronts 10.90@125 1.47 \| + GPI VVT Cam + BW Ported Heads + CD 3800

08-13-2015, 08:38 PM	#5
Demon War Horse War Horse Pilot Drives: 2017 NFG 1SS 1LE Join Date: Jul 2014 Location: N.Texas Posts: 2,458 View My Garage	Had mine cut out and a custom X done in its place. Does drone though and unless you have a Range device or have AFM tuned out, the 4cyl mode sucks! __________________ COTW 09/07/2015 - 2014 AGM 2SS/RS - RIP 6/01/17 2017 Nightfall Gray Metallic 1SS 1LE Born 5/17/17 - *Click Sig Pic below for for Demon War Horse 02 Build Thread* SigPic by Hazman

08-13-2015, 10:36 PM	#8
CRF8 Scenic City Camaro Drives: 2022 Camaro ZL-1 /1974 Firebird 400 Join Date: Jan 2014 Location: Chattanooga TN Posts: 578 View My Garage	I have already replaced the mufflers with axleback so maybe I should leave this alone __________________ 2022 Camaro ZL-1, grey 1974 Firebird Formula 400, white https://www.facebook.com/groups/Camaro/ https://www.facebook.com/CRFinTN/?modal=admin_todo_tour

08-13-2015, 10:44 PM	#9
dontlift19 Drives: 2012 2SS/RS Join Date: Dec 2014 Location: Texas Posts: 120	I have the factory manifolds and cats, replaced the resonator with an x pipe, and electric exhaust cutouts that bypass my mufflers and there's a little drone but it's so faint you barely notice it. It sounds awesome when you get on it too, more of high pitched exotic kind of sound. Forgot to mention I also have the range device. Sent from my iPhone using Tapatalk

08-14-2015, 06:34 AM	#11
AllBlackSS Drives: 2010 SS Join Date: May 2014 Location: Maryland Posts: 418	Had mine cut out along with the mufflers too. So I'm running straight pipes from the cats back with an x pipe where the resonator used to be. As others have said, make sure to get a range device or get a tune that gets rid of AFM or it will sound like crap when AFM kicks in. Overall, it sounds awesome so do it you won't regret it!!!

08-14-2015, 08:38 AM	#12
Red2014SS Drives: 2014 2SS/RS Camaro Join Date: Dec 2014 Location: Kentucky Posts: 2,421	Thanks to everyone. I will be getting a regular, non-resonated x-pipe. Bye bye resonator and 40 extra lbs. __________________ 2014 2SS/RS, L99, SW LTH w/HF Cats, GMPP Ex. Z/28 CAI, FR41s in PVD Black Chrome, Recaros, Pfadt Sway 377hp, 383tq 12.739@110.44 MPH

08-14-2015, 06:09 PM	#13
Badfinger Drives: 2010 2SS Join Date: Mar 2010 Location: Dayton, Ohio Posts: 387 View My Garage	I have Kooks LT headers with Hi Flow cats, jeg's X pipe, GMPP mufflers, and Drone!

08-17-2015, 12:53 PM	#14
Everest Drives: 2SS/RS L99 Rally Yellow Sun Roof Join Date: Apr 2010 Location: Alberta, Canada Posts: 197 View My Garage	I have Kooks Lt's, high flow cats, deleted the Resonator, Borla S-Type exhaust and had Drone up the azz. Installed solo J-Pipes and BAM drone was gone.