2012 SS L99 stock exhaust sounds so weak - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

2SSRSinBama · 09-07-2012, 12:31 PM

Headers, no cats, unresonated Xpipe......what quite L99? Lol

ZL-Bee · 10-07-2012, 11:04 AM

AFM resonators will kill the sound when you combine them with the normal set of resonators & cats.

SSGUNNER · 10-07-2012, 11:14 AM

They are week. Got rid of mine and went the flowmaster AT.

TocaSeries · 10-07-2012, 12:41 PM

I had the same issue, I have a 2013 L99, and I couldnt believe for a V8 there was no rumble! 3 mods changed my cars life, the CAI, LT headers and Brola S-Type catback. It sounds like I have 10k of work in it lol, loving the sound! Also DO THE TUNE!....if you dont, your not going to be happy with how it drives. Literally night and day for me.

Ventmaster · 10-07-2012, 03:51 PM

Be aware most axle-back options will not extend far enuff to remove the sound attenuators in the L99 exhaust.

You'll need to cut them out or go with a cat-back system.

It's the spring loaded "pop-off" valve in thses pics:

BigRed585Lbs · 10-07-2012, 06:14 PM

Man up. It's only money.

VADER SS L99 · 10-07-2012, 08:02 PM

Its weak because GM unwisely put a truck motor in the car with AFM. They had to kill the ricer noise when in 4 bagger mode which is why there is huge resonaters and mufflers. If you truely want great V8 sound get some LT headers with a tune that leaves the car in V8 mode all the time.

Ventmaster · 10-08-2012, 01:37 PM

We put a Magnaflow Street Series catback on the SS above followed by Solo HFC's.

Got the perfect combo of "modern, civilized-but-mean muscle car" sound the owner was looking for. AFM drone is more noticable but tolerable, although the owner is planning to tune anyway, but more for tranny performance improvements.

I would recommend this set-up to anyone (has me considering finally trading up for a V8!).

Rockhound · 10-10-2012, 10:01 AM

Quote:

Originally Posted by Ventmaster

Be aware most axle-back options will not extend far enuff to remove the sound attenuators in the L99 exhaust.

You'll need to cut them out or go with a cat-back system.

It's the spring loaded "pop-off" valve in thses pics:

Did they change the piping on the 2012 models?

MMC · 10-10-2012, 10:09 AM

The "pop off" valves are only on ragtops.

Stingray · 10-10-2012, 10:14 AM

BTW, wouldn't a simple 'muffler delete' resurrect the rumble? Those stock trash cans are horrible.

alanhurst · 10-10-2012, 12:31 PM

Quote:

Originally Posted by Forty5th

BTW, wouldn't a simple 'muffler delete' resurrect the rumble? Those stock trash cans are horrible.

meh,somewhat but you'll still have that coffin sized resonator killing your sound.

AKAviking14 · 10-11-2012, 12:37 PM

I agree that the stock exhaust is very weak. I own a 2012 2ss/rs l99 and I recently installed a cai inc intake. The made a huge difference in the sound. The sound was deeper, louder, and sounded better overall when on the throttle. The sound is still not loud enough. So... I just purchased a borla atak exhaust. I can't wait to hear the sound.

JHart · 10-11-2012, 03:18 PM

If anything, pick up a stock LS3 car exhaust(you know everyones changed em, they'll prob sell cheap, prob some local to you), and delete the mufflers, you now have an un-resonated, un-muffled exhaust, with stock cats, should suffice for ya man.

09-07-2012, 12:31 PM	#15
2SSRSinBama Drives: 2010 2SS/RS Camaro CGM Join Date: Aug 2011 Location: "The Shoals" Alabama Posts: 767	Headers, no cats, unresonated Xpipe......what quite L99? Lol __________________ 2010 Camaro SS L99... has a few mods

10-07-2012, 11:14 AM	#17
SSGUNNER Chu no guat a hasa is? Drives: 14 Jeep G Cherokee Overland HEMI Join Date: Jun 2011 Location: Some where in So Cal Posts: 4,273	They are week. Got rid of mine and went the flowmaster AT. __________________ 11 2SS/RSL99No Longer Stock (Sold) 6/19/14:AAC Plasma DRL's \| Plug n play harness \| Elite CC \| Tint: 35% & 5% \| LED Dome light \| Show-N-Go Plate Holder \| Flowmaster AT \| C.A.I. Intake \| VMAX CNC Spiral Ported TB \| Husky Splash Guards

10-07-2012, 03:51 PM	#19
Ventmaster Drives: 2017 1SS 6spd Join Date: Jan 2011 Location: Utah Posts: 2,869	Be aware most axle-back options will not extend far enuff to remove the sound attenuators in the L99 exhaust. You'll need to cut them out or go with a cat-back system. It's the spring loaded "pop-off" valve in thses pics: Attached Images

10-07-2012, 08:02 PM	#21
VADER SS L99 Drives: 2013 A6 GT 5.0 Join Date: Nov 2009 Location: Edmond, OK Posts: 2,909	Its weak because GM unwisely put a truck motor in the car with AFM. They had to kill the ricer noise when in 4 bagger mode which is why there is huge resonaters and mufflers. If you truely want great V8 sound get some LT headers with a tune that leaves the car in V8 mode all the time. __________________ 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.

10-10-2012, 10:09 AM	#24
MMC Drives: CGM 2SS/RS, 1987 & 2014 Silverado Join Date: Oct 2010 Location: Spencerport, NY Posts: 1,012	The "pop off" valves are only on ragtops. __________________

10-07-2012, 11:04 AM	#16
ZL-Bee Account Suspended Drives: 2010 Camaro 2SS/RS Join Date: Sep 2012 Location: York, PA Posts: 576	AFM resonators will kill the sound when you combine them with the normal set of resonators & cats.

10-07-2012, 12:41 PM	#18
TocaSeries Drives: 2013 Camaro 2SS Join Date: Aug 2012 Location: Chicago, IL Posts: 143	I had the same issue, I have a 2013 L99, and I couldnt believe for a V8 there was no rumble! 3 mods changed my cars life, the CAI, LT headers and Brola S-Type catback. It sounds like I have 10k of work in it lol, loving the sound! Also DO THE TUNE!....if you dont, your not going to be happy with how it drives. Literally night and day for me.

10-08-2012, 01:37 PM	#22
Ventmaster Drives: 2017 1SS 6spd Join Date: Jan 2011 Location: Utah Posts: 2,869	We put a Magnaflow Street Series catback on the SS above followed by Solo HFC's. Got the perfect combo of "modern, civilized-but-mean muscle car" sound the owner was looking for. AFM drone is more noticable but tolerable, although the owner is planning to tune anyway, but more for tranny performance improvements. I would recommend this set-up to anyone (has me considering finally trading up for a V8!).

10-10-2012, 10:14 AM	#25
Stingray just can't get enough Drives: a bunch of fast toys... Join Date: May 2012 Location: SoFla Posts: 3,605 View My Garage	BTW, wouldn't a simple 'muffler delete' resurrect the rumble? Those stock trash cans are horrible.

10-11-2012, 12:37 PM	#27
AKAviking14 SoCal HT5 Drives: Summit White 2012 2SS/RS L99 Join Date: Jun 2011 Location: Anaheim Hills, California Posts: 1,050 View My Garage	I agree that the stock exhaust is very weak. I own a 2012 2ss/rs l99 and I recently installed a cai inc intake. The made a huge difference in the sound. The sound was deeper, louder, and sounded better overall when on the throttle. The sound is still not loud enough. So... I just purchased a borla atak exhaust. I can't wait to hear the sound. __________________ YouTube Channel: http://www.youtube.com/akaviking14 Facebook Page: http://www.facebook.com/akaviking14 2012 Summit White 2SS/RS

10-11-2012, 03:18 PM	#28
JHart I haz camaro again :) Drives: 2010 Chevrolet Camaro 1SS Join Date: Mar 2009 Location: Union, South Carolina Posts: 660	If anything, pick up a stock LS3 car exhaust(you know everyones changed em, they'll prob sell cheap, prob some local to you), and delete the mufflers, you now have an un-resonated, un-muffled exhaust, with stock cats, should suffice for ya man. __________________ 2010 Camaro 1SS(back in a camaro again, yessssss!) 2010 silverado z71 ccsb(sold, old dd) 2010 camaro1ss(sold, missed, will have another someday)