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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 11-28-2010, 10:26 PM   #1
1sspat
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Flowmaster--American Thunder.

Looking to finally purchase an exhaust for my 1SS. The American Thunder sounds super good!! I was wanting feed back from people who have purchased the exhaust for their SS. Is there a drone at highway speeds, and how bad if there is one? Is the overall performance noticeable? Would you recommend the exhaust?
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Old 11-28-2010, 11:02 PM   #2
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I really love mine ..not much drone with LS3..The sound is awesome the car sounds great inside and out!!
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Old 11-28-2010, 11:03 PM   #3
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Flowmaster always sounds great
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Old 11-28-2010, 11:49 PM   #4
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I have had mine for a while now, they did the install for a PowerTV episode. I have a
L99 and had some drone at first, Has broken in nice and I have since turned off the AFM makes big difference. Moderate sound. The are designing a new product line that I will be testing in the next week or so that will be louder based on their Outlaw line. I will post sound clip and photos when completed.
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Old 11-29-2010, 07:33 AM   #5
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I have Flowmasters AMT's as well and I love the sound. I have a L99 with AFM off, and I am pleased with the system.
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Old 11-29-2010, 02:17 PM   #6
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buffnshine, do you have any info on the outlaw line you mentioned?
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Old 11-29-2010, 02:26 PM   #7
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I'm interested too
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Old 11-29-2010, 04:17 PM   #8
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Old 11-29-2010, 05:22 PM   #9
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I have the V6 version, but I really love Flowmaster. Made my car come alive and NO Drone. Sure the V8 version is bad assed as well.
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Old 11-29-2010, 06:52 PM   #10
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Quote:
Originally Posted by Buffnshine View Post
I have had mine for a while now, they did the install for a PowerTV episode. I have a
L99 and had some drone at first, Has broken in nice and I have since turned off the AFM makes big difference. Moderate sound. The are designing a new product line that I will be testing in the next week or so that will be louder based on their Outlaw line. I will post sound clip and photos when completed.
Hopefully it will be quite a bit louder than the American Thunder. Flowmaster was probably my favorite tone when shopping for an exhaust but was just too tame so I went with Borla. If it was more aggressive I would have went flowmaster no doubt.
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Old 11-29-2010, 07:05 PM   #11
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http://www.flowmastermufflers.com/sh...20&orig=817487

Just got this system installed the other day. Sounds wicked.
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Old 11-29-2010, 07:09 PM   #12
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Mine will be going on this week, can't wait
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Old 11-29-2010, 07:20 PM   #13
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i have amt also for ls3. the problem i had with it is as time pass by the assemply gets a bit of play w/c makes u lose the gap between the tunnel brace and pipes and make that clanking noise. so i went to an exhaust shop and got them welded and adjusted to remove unecessary slack/play. they are phenomenal for the price and the sound.
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Old 11-29-2010, 11:56 PM   #14
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They are prototyping after I talked with them at SEMA about needing a louder system such as the Magnaflow comp series. Im hoping it will be done this week, They said it wil be a new line available for the Challenger and Mustang as well.
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Old 11-30-2010, 07:44 AM   #15
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Ordering it now, can post vids when I have it installed.

I have kooks LT headers with their cats they supply. Car is wayyyyy to loud right now (no mufflers or resonator lol!)
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Old 11-30-2010, 07:54 AM   #16
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I have them installed on an LS3 and really like the sound. They arent as aggressive sounding as the Borla system and sound less raspy imo. Great bang for your money and give it a month or so to break them in and they start sounding MUCH better. 6th gear gives some drone at certain RPM's but its not that bad.
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Old 12-01-2010, 12:54 AM   #17
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I'll be getting this soon. Definitely best bang for your dollar.
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Old 12-01-2010, 06:26 AM   #18
1sspat
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Thanks for all your help guys. where did u find the cheapest AMT exhaust?
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Old 12-01-2010, 08:33 AM   #19
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I also have Flowmaster AMT Cat Back...no headers. I really like the sound, but as mentioned above, there is a little drone at 75 - 80 in 6th gear. The drone doesn't bother me too much, but wears on the wife.....

I got mine from Maryland Speed for around $630 with fast shipping.

M
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Old 12-01-2010, 09:14 AM   #20
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I just bought mine from exhaustexhaust.com got it in 3 days.

Cheapest around AFAIK - $610.xx for system without ground effects
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Old 12-01-2010, 10:47 AM   #21
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I have AT's on mine, and they sound nice! You will not see much of a performance increase though, as with any cat back system. If you are looking for performance, you will have to go with LT headers & high flow cats.
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Old 12-01-2010, 11:54 AM   #22
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Quote:
Originally Posted by Camaro Freak View Post
I have the V6 version, but I really love Flowmaster. Made my car come alive and NO Drone. Sure the V8 version is bad assed as well.
Love it !
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Old 12-01-2010, 02:41 PM   #23
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I put super 40's on my L99 and it is awesome. The only thing left is to add high flow cats.
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Old 12-08-2010, 11:22 AM   #24
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Thanks for all your support. We’re glad you all enjoy your Flowmaster American Thunder exhaust systems on your 2010 and 2011 Camaros. Don’t forget that you can show us how much you like your Flowmaster exhaust by entering our Flowmaster Show Us Your Flows video contest.

http://www.camaro5.com/forums/showthread.php?t=119012
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Old 12-10-2010, 05:26 AM   #25
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is there any videos shows flowmaster catback in l99 ?
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