LS99 Magnaflow Volume - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ROKINSS · 03-16-2010, 11:25 PM

Just had 2 magnaflows (axle back) installed in my L99. According to magnaflow, they are the same muffler supplied with their Camaro cat back systems. The resulting tone is slightly more growl that is a little lower than factory with only a slight increase in volume. I would like to get more volume, but do not want AFM drone and do not plan to tune out AFM out. Will replacing the factory resonator with a Magnaflow resonator or replacing the resonator with straight pipes give me more volume without drone? At present, I do not hear any drone. BTW, the factory mufflers that came off the car are very heavy and they were full of condensation (water). My exhaust guy says they are a terrible design.

Thanks

tony1 · 03-17-2010, 07:52 AM

Quote:

Originally Posted by ROKINSS

Just had 2 magnaflows (axle back) installed in my L99. According to magnaflow, they are the same muffler supplied with their Camaro cat back systems. The resulting tone is slightly more growl that is a little lower than factory with only a slight increase in volume. I would like to get more volume, but do not want AFM drone and do not plan to tune out AFM out. Will replacing the factory resonator with a Magnaflow resonator or replacing the resonator with straight pipes give me more volume without drone? At present, I do not hear any drone. BTW, the factory mufflers that came off the car are very heavy and they were full of condensation (water). My exhaust guy says they are a terrible design.

Thanks

yeah .. I got the comp series .. No muffler on the L99 and it's not too loud at all .. the resonators do a good job with out the need for mufflers. Also my car has 500 miles and never driven in the rain but my mufflers were also full of water .. I'll bet everyone's are .. that even makes them heavier..

Brister1 · 03-17-2010, 10:14 AM

Quote:

Originally Posted by tony1

yeah .. I got the comp series .. No muffler on the L99 and it's not too loud at all .. the resonators do a good job with out the need for mufflers. Also my car has 500 miles and never driven in the rain but my mufflers were also full of water .. I'll bet everyone's are .. that even makes them heavier..

I have the Comp. axle back as well. it has a nice deep "roar" to it, love it!

YES!!!!! My stock mufflers were LOADED with water and I NEVER drove it in the rain and it only had about 600 miles on them.

Sherwood SS · 03-17-2010, 12:54 PM

I have the cat back comp series and I could tell every time the AFM kicked in. It bugged the crap out of me so I tuned it out. I would suggest leaving the resonators alone if you don't want to tune out the AFM, because it will get louder and more annoying.

2010 SSRS · 03-17-2010, 01:03 PM

Mufflers full of water,

Iwantone2 · 03-17-2010, 02:19 PM

Yep, my stock mufflers had water in them as well. ROKINSS, i replaced the resonator with an x-pipe and i don't hear any AFM drone on my L99

Buffnshine · 03-17-2010, 08:00 PM

Quote:

Originally Posted by Iwantone2

Yep, my stock mufflers had water in them as well. ROKINSS, i replaced the resonator with an x-pipe and i don't hear any AFM drone on my L99

DO you have the comp axle back with the 5" tips and the x-pipe and you are happy with sound, Im not sure how I have missed hearing your car at our meets. You going on the 27th? I am NOT looking for quiet

Buffnshine · 03-17-2010, 08:02 PM

Quote:

Originally Posted by ROKINSS

Just had 2 magnaflows (axle back) installed in my L99. According to magnaflow, they are the same muffler supplied with their Camaro cat back systems. The resulting tone is slightly more growl that is a little lower than factory with only a slight increase in volume. I would like to get more volume, but do not want AFM drone and do not plan to tune out AFM out. Will replacing the factory resonator with a Magnaflow resonator or replacing the resonator with straight pipes give me more volume without drone? At present, I do not hear any drone. BTW, the factory mufflers that came off the car are very heavy and they were full of condensation (water). My exhaust guy says they are a terrible design.

Thanks

Where did you get then done at? I am here in FV as well, if you dont mind could you PM the price would love to see your car. Im right by Islands

Roger Ramjet · 03-17-2010, 08:55 PM

Since you already have the rear Magnaflow mufflers, I would recommend removing the center resonator. Install straight pipe where the resonator was but add an H pipe in there somewhere. Without the H pipe the sound is more of a low frequency blah-blah. Adding the H will keep the rip-rip sound without causing drone. The X seems to contribute to drone.

VADER SS L99 · 03-17-2010, 11:29 PM

You need to replace the center section resonator with Magnaflows true X muffler. If you replace the center section with straight pipe the AFM is going to drive you nuts and the car will sound like a ricer on the highway. The true x muffler should free up the sound you want while keeping drone and AFM noises down to a minimum.

Iwantone2 · 03-18-2010, 10:04 AM

Quote:

Originally Posted by Buffnshine

DO you have the comp axle back with the 5" tips and the x-pipe and you are happy with sound, Im not sure how I have missed hearing your car at our meets. You going on the 27th? I am NOT looking for quiet

I have a custom cat-back similar to the one below :

I like the sound that I got and I don't hear when the AFM kicks in.

Unfortunately, I won't be going on the 27th...I can meet up with you if you want some time. I work in Los Alamitos and live in Orange.

myold88 · 03-18-2010, 10:44 AM

Quote:

Originally Posted by ROKINSS

Just had 2 magnaflows (axle back) installed in my L99. According to magnaflow, they are the same muffler supplied with their Camaro cat back systems. The resulting tone is slightly more growl that is a little lower than factory with only a slight increase in volume. I would like to get more volume, but do not want AFM drone and do not plan to tune out AFM out. Will replacing the factory resonator with a Magnaflow resonator or replacing the resonator with straight pipes give me more volume without drone? At present, I do not hear any drone. BTW, the factory mufflers that came off the car are very heavy and they were full of condensation (water). My exhaust guy says they are a terrible design.

Thanks

Could you please tell me what part number Magnaflows you put on your L99 SS. I have a set of #16581's (with mufflers) ready to go on, but I've been leary of the possable DROAN and also don't want to tune out the AFM for warranty reasons. I can't hear any droan with my stock exhaust.

Snake Slayer · 03-18-2010, 12:28 PM

Quote:

Originally Posted by myold88

Could you please tell me what part number Magnaflows you put on your L99 SS. I have a set of #16581's (with mufflers) ready to go on, but I've been leary of the possable DROAN and also don't want to tune out the AFM for warranty reasons. I can't hear any droan with my stock exhaust.

you should have no issues. I have the comp series cat back 16580 which has no rear mufflers and I have zero drone with AFM. The frequencency is a bit more pronounced when AFM kicks in but not much louder that the stock system.

03-17-2010, 12:54 PM	#4
Sherwood SS Drives: Black SS/RS Join Date: Nov 2009 Location: Houston Posts: 351	I have the cat back comp series and I could tell every time the AFM kicked in. It bugged the crap out of me so I tuned it out. I would suggest leaving the resonators alone if you don't want to tune out the AFM, because it will get louder and more annoying. __________________ Black SS/RS - Magnaflow Comp Series, Eibach Suspension, Roto-Fab Intake

03-17-2010, 01:03 PM	#5
2010 SSRS Drives: 3 V8 Camaros Join Date: May 2009 Location: The Ocean State Posts: 111,187 View My Garage	Mufflers full of water, __________________ Jannetty Racing JRE Street Package

03-17-2010, 02:19 PM	#6
Iwantone2 Voice Of The Voiceless Drives: CGM 1SS RS Join Date: Feb 2009 Location: OC Cali Posts: 9,617 View My Garage	Yep, my stock mufflers had water in them as well. ROKINSS, i replaced the resonator with an x-pipe and i don't hear any AFM drone on my L99 __________________

03-17-2010, 08:55 PM	#9
Roger Ramjet Motor Head Drives: CTS-V Join Date: Feb 2009 Location: So MD Posts: 494	Since you already have the rear Magnaflow mufflers, I would recommend removing the center resonator. Install straight pipe where the resonator was but add an H pipe in there somewhere. Without the H pipe the sound is more of a low frequency blah-blah. Adding the H will keep the rip-rip sound without causing drone. The X seems to contribute to drone. __________________ History Camaro's: 83, 93, 95, 98, & 10.

03-17-2010, 11:29 PM	#10
VADER SS L99 Drives: 2013 A6 GT 5.0 Join Date: Nov 2009 Location: Edmond, OK Posts: 2,909	You need to replace the center section resonator with Magnaflows true X muffler. If you replace the center section with straight pipe the AFM is going to drive you nuts and the car will sound like a ricer on the highway. The true x muffler should free up the sound you want while keeping drone and AFM noises down to a minimum. __________________ BLK/BLK 1SS/RS Ordered 11-01-2009 Took delivery 12-22-2009. Heads/cam/converter/bolt ons. SOLD Feb 2015 to fund 6th gen LT1 SS with 8L90E.

03-16-2010, 11:25 PM	#1
ROKINSS Drives: 2010,2SS/RS,LS99 A6 Inferno Orange Join Date: Mar 2010 Location: Fountain Valley, CA Posts: 26	LS99 Magnaflow Volume Just had 2 magnaflows (axle back) installed in my L99. According to magnaflow, they are the same muffler supplied with their Camaro cat back systems. The resulting tone is slightly more growl that is a little lower than factory with only a slight increase in volume. I would like to get more volume, but do not want AFM drone and do not plan to tune out AFM out. Will replacing the factory resonator with a Magnaflow resonator or replacing the resonator with straight pipes give me more volume without drone? At present, I do not hear any drone. BTW, the factory mufflers that came off the car are very heavy and they were full of condensation (water). My exhaust guy says they are a terrible design. Thanks

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