Advice on L99 Exhaust - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Jnicho · 10-22-2015, 03:56 PM

OK, I know there is a ton of info/opinion on this and I've read a lot of it. To that end I will try to keep this on the straight and narrow. My fiancee wants her new SS to sound louder/tougher than it does with the weak exhaust system GM put on at the factory. It's the L99/auto which has AFM. As the car is brand new we will not be risking voiding the warranty by turning AFM off. From what I've read I think I've decided on the axle back Solo J-pipe setup as the best option for sound/drone/AFM annoyance. Before I run out and buy something I wanted to get any opinions y'all might have on getting the best sound out of the L99 with AFM still on. I'm not going to do anything as major as high flow cats, etc. Options have to be some type of muffler delete, axle back or cat back/X-pipe type systems or variants there of.

Aaron0731 · 10-22-2015, 03:58 PM

I run magnaflow and it's a deep mellow sound with no drone. Not very loud unless you open it up. Sounds good.

Jnicho · 10-22-2015, 04:07 PM

Quote:

Originally Posted by Aaron0731

I run magnaflow and it's a deep mellow sound with no drone. Not very loud unless you open it up. Sounds good.

Is that a magnaflow cat back system on a L99? I hear some folks have issues with the AFM without the J-pipes. I see you're also in KC....what part of town?

Wattser93 · 10-22-2015, 04:13 PM

Get a range device to defeat the AFM and pick whichever exhaust you like best.

AFM is annoying anyways.

Camaro310 · 10-22-2015, 04:23 PM

I got a Jegs X pipe and Off Road GMPP Mufflers of a member here on Camaro5. Than I Welded quad tips in the back.

Jnicho · 10-22-2015, 04:25 PM

Quote:

Originally Posted by Wattser93

Get a range device to defeat the AFM and pick whichever exhaust you like best.

AFM is annoying anyways.

I saw those. It's actually my fiancee's car or it would have one plugged in already, LOL! I'll chat with her and see if she's game to have one. Just need to make sure she remembers to pull it before she rolls into the dealer for service.

Camaro310 · 10-22-2015, 04:26 PM

Here is a good option. Before spending lot's of money. Go to the muffler shop and get a simple muffler delete. It's just as good as any exhaust on the market.

Camaro310 · 10-22-2015, 04:31 PM

You know you can turn AFM Off?

Step 1. Start Car
Step 2. Shift to M
Step 3. Tap the down Shift 2 Times.
Step 4. Tap The up Shift 2 times until you see, SHIFT denied.
Step 5. Tapp Down shift 2 Times.
Step 6. Hold traction controll down for 7-10 seconds.
Step 7. Drive in M mode, and use paddle shifters.

Demon War Horse · 10-22-2015, 04:32 PM

Quote:

Originally Posted by Jnicho

OK, I know there is a ton of info/opinion on this and I've read a lot of it. To that end I will try to keep this on the straight and narrow. My fiancee wants her new SS to sound louder/tougher than it does with the weak exhaust system GM put on at the factory. It's the L99/auto which has AFM. As the car is brand new we will not be risking voiding the warranty by turning AFM off. From what I've read I think I've decided on the axle back Solo J-pipe setup as the best option for sound/drone/AFM annoyance. Before I run out and buy something I wanted to get any opinions y'all might have on getting the best sound out of the L99 with AFM still on. I'm not going to do anything as major as high flow cats, etc. Options have to be some type of muffler delete, axle back or cat back/X-pipe type systems or variants there of.

1. Range device to avoid AFM
2. Axle back of your choice from Borla, Flowmaster, Etc.
3. X pipe in place of the factory resonator.

AFM with any axle back sounds terrible. I have a custom X pipe in place of the resonator and I have a Cherry Bomb Extreme Axle back on mine. I love how it sounds, but I do not have any vids of it. If you YouTube Camaro SS with Cherry Bomb Extreme, you will see a vid of a Black SS and mine sounds just like it.

You will not really get any power gains from these mods, but sound and that is totally worth it. These are too quiet from the factory! If I had it to do over I would retrofit the NPP to my car and call it done, but that is another story.

pyroguy · 10-22-2015, 04:33 PM

Great choice on Solo, but don't get the axle back, go for the full Mach XL catback. The stock resonator will still kill sound. With the muffled x pipe included in the catback setup it really allows the car to wake up. It is wife/girlfriend/fiance friendly and car guy approved!

If you REALLY want to get it loud, once you quit caring about warranty get some long tube headers to mate up to that setup. Holy **** it gets loud when you get on it!

BAD DAB · 10-22-2015, 04:45 PM

The Solo Axleback exhaust with J-Pipes will give you what you are looking for.

Aaron0731 · 10-22-2015, 05:36 PM

Quote:

Originally Posted by Jnicho

Is that a magnaflow cat back system on a L99? I hear some folks have issues with the AFM without the J-pipes. I see you're also in KC....what part of town?

I had Seeburg Mufflers (great shop) install the magnaflow mufflers, got the resonator deleted and had them install an x-pipe. It's a lot cheaper then buying a full cat back and you get the same results. The stock piping is plenty at 2.5". The AFM isn't bad but is noticeable. I've since tuned it out. I'm up north off of NW Barry Rd.

Welker2 · 10-22-2015, 06:08 PM

I'm running Flowmaster Force II axle back on my '13 SS L99 and really like them ...

The Patriot · 10-22-2015, 06:32 PM

A straight muffler delete on my L99 sounds great. I would suggest you try it first, you can always add an exhaust. As for AFM, paddle shift defeats it.

10-22-2015, 03:56 PM	#1
Jnicho Drives: 2015 2SS Coupe Join Date: Sep 2015 Location: KC, MO Posts: 14	Advice on L99 Exhaust OK, I know there is a ton of info/opinion on this and I've read a lot of it. To that end I will try to keep this on the straight and narrow. My fiancee wants her new SS to sound louder/tougher than it does with the weak exhaust system GM put on at the factory. It's the L99/auto which has AFM. As the car is brand new we will not be risking voiding the warranty by turning AFM off. From what I've read I think I've decided on the axle back Solo J-pipe setup as the best option for sound/drone/AFM annoyance. Before I run out and buy something I wanted to get any opinions y'all might have on getting the best sound out of the L99 with AFM still on. I'm not going to do anything as major as high flow cats, etc. Options have to be some type of muffler delete, axle back or cat back/X-pipe type systems or variants there of.

10-22-2015, 04:33 PM	#10
pyroguy Started#gottalovethatblue Drives: ABM #831 Join Date: Apr 2013 Location: TN Posts: 6,919 View My Garage	Great choice on Solo, but don't get the axle back, go for the full Mach XL catback. The stock resonator will still kill sound. With the muffled x pipe included in the catback setup it really allows the car to wake up. It is wife/girlfriend/fiance friendly and car guy approved! If you REALLY want to get it loud, once you quit caring about warranty get some long tube headers to mate up to that setup. Holy **** it gets loud when you get on it! __________________ '10 Camaro 2SS/RS \| Aqua Blue #831 of 3,903 \| Silver Stripes Check out my build thread

10-22-2015, 04:45 PM	#11
BAD DAB Drives: 2010 Camaro 2SS/RS Black & Silver Join Date: Aug 2010 Location: Richmond, VA Posts: 8,228 View My Garage	The Solo Axleback exhaust with J-Pipes will give you what you are looking for. __________________ STAINLESS WORKS HEADERS-TUNED BY JANNETTY RACING-C.A.I. INTAKE-TAYLOR 409 WIRES-SOLO AXLE BACK EXHAUST-ELITE CATCH CAN

10-22-2015, 06:08 PM	#13
Welker2 Ret AF, cancer survivor Drives: 2013 Camaro 2SS/RS & 2006 Corvette Join Date: Jul 2015 Location: Mesquite, NV Posts: 2,741 View My Garage	I'm running Flowmaster Force II axle back on my '13 SS L99 and really like them ... __________________

10-22-2015, 06:32 PM	#14
The Patriot Drives: 2014 2SS/RS VERT Join Date: Mar 2015 Location: Idaho Posts: 455	A straight muffler delete on my L99 sounds great. I would suggest you try it first, you can always add an exhaust. As for AFM, paddle shift defeats it. __________________ 2014 2SS/RS Vert. "Today I didn't even have to use my AK, I got ta' say it was a good day"

10-22-2015, 03:58 PM	#2
Aaron0731 Drives: 2010 2SS/RS L99 Join Date: Oct 2015 Location: Fort Wayne, IN Posts: 295	I run magnaflow and it's a deep mellow sound with no drone. Not very loud unless you open it up. Sounds good.

10-22-2015, 04:13 PM	#4
Wattser93 Drives: 2013 2SS RS L99 Join Date: Jun 2015 Location: Nevada Posts: 43	Get a range device to defeat the AFM and pick whichever exhaust you like best. AFM is annoying anyways.

10-22-2015, 04:23 PM	#5
Camaro310 Drives: 2013 Camaro 2SS/RS Fully loaded Join Date: May 2013 Location: Beverly Hills, Los Angeles Posts: 234 View My Garage	I got a Jegs X pipe and Off Road GMPP Mufflers of a member here on Camaro5. Than I Welded quad tips in the back.

10-22-2015, 04:26 PM	#7
Camaro310 Drives: 2013 Camaro 2SS/RS Fully loaded Join Date: May 2013 Location: Beverly Hills, Los Angeles Posts: 234 View My Garage	Here is a good option. Before spending lot's of money. Go to the muffler shop and get a simple muffler delete. It's just as good as any exhaust on the market.

10-22-2015, 04:31 PM	#8
Camaro310 Drives: 2013 Camaro 2SS/RS Fully loaded Join Date: May 2013 Location: Beverly Hills, Los Angeles Posts: 234 View My Garage	You know you can turn AFM Off? Step 1. Start Car Step 2. Shift to M Step 3. Tap the down Shift 2 Times. Step 4. Tap The up Shift 2 times until you see, SHIFT denied. Step 5. Tapp Down shift 2 Times. Step 6. Hold traction controll down for 7-10 seconds. Step 7. Drive in M mode, and use paddle shifters.