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

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Old 11-14-2009, 10:12 AM   #1
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Kooks 1 7/8 and Magnaflow 2.5'' street catback

I made a short clip of my setup. I got Kook 1 7/8 headers with cats and a Magnaflow 2.5'' street catback put on Thursday.
It sounds great (don't really go by the video). I made the video with a 10 year old Sony digital camera and the quality is terrible.

The setup is real quiet for a car with Long tubes. That's what I wanted. I got the Magnaflow street catback to keep the noise level in check. It has a real nice low rumble at idle. It really doesn't open up until about 2500 - 3000 rpms. At WOT is sounds unreal (but still not overly loud or obnoxious). Overall its a tame setup for a car with longtubes.

I have an L99 so there is the AFM issue. I do get that annoying AFM sounds when its engaged. I'm getting my car re-tuned on Wedneday to turn off the AFM.
At cruise speeds its very quiet (2000 rpms at 65mph or so) and there is no drone. If you use the tap shifts and put the car in 6th gear, its real quiet with absolutely no drone at 60mph (my L99 has no AFM while using the tap shifts).

In the clip I only revved to 2000 rpms followed by 2500 rpms. I had neighbors outside and I didn't want to freak them out. But you get the general idea. Its a pretty tame setup. So for anyone wanting long tubes and you want to keep the noise level down (while still sounding bad axx), this is a great setup for you.

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Old 11-14-2009, 01:12 PM   #2
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I've been waiting on this sence you was talking about it last week.
It really sounds great! It's always hard to tell in a clip, but how much louder
is it over stock at idle?
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Old 11-14-2009, 01:41 PM   #3
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I've been waiting on this sence you was talking about it last week.
It really sounds great! It's always hard to tell in a clip, but how much louder
is it over stock at idle?
Compared to stock (which was whisper quiet in my L99) its quite a bit louder. Its nice and aggressive (definately doesn't sound stock) when you first start it, but its still really tame compared to other setups with longtubes. The installer at the performance shop was amazed by how quiet it was. Most the cars they install 1 7/8 headers on end up being very loud. The Magnaflow street catback does a great job at keeping the noise level down.

I can't be more pleased. I really wanted longtubes, but I didn't want my neighbors pissed off at me when I start my car up in the morning.

And its got a nice low muscle car type sound. Its not raspy at all. It sounds really good.
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Old 11-14-2009, 01:51 PM   #4
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Sounds great
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Old 11-14-2009, 02:06 PM   #5
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Ok cool.....I know you just got it but have you had any codes yet? I'm
probably going to go ahead and get LT's, but no tune rite now. I think
one member(Tag) has LT's,no tune,and his is not throwing codes anymore.
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Old 11-14-2009, 04:16 PM   #6
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Ok cool.....I know you just got it but have you had any codes yet? I'm
probably going to go ahead and get LT's, but no tune rite now. I think
one member(Tag) has LT's,no tune,and his is not throwing codes anymore.
I went one day with no codes. But yesterday, on my way to work I got an emissions code. I could unhook my battery and get rid of it, but I'm getting my car re-tuned on Wednesday (adjust A/F for new mods, and delete AFM).

As mentioned (Tag), if you clear the code, there's a decent chance (50/50) that the code will not come back. You can keep clearing the code and hopefully the computer will adjust to your new setup. But there's also a decent chance, it will continue to throw an emissions code.
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Old 11-14-2009, 04:57 PM   #7
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Sounds good.
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Old 11-15-2009, 07:26 AM   #8
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You will absolutely love the AFM delete. Worth the price of a tune all by itself.. But since this is a touch up tune if you go to the same guy I`m sure it will be very little compared to the first tune. The car will be beast!

Be sure to post your dynograph in my thread, you will have the mods I`m looking for, bolt on compilation. Hopefully its a dynojet. thanks.

http://www.camaro5.com/forums/showthread.php?t=49703
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Bolt on best before blower 12.22@113.29 w/ nothing but ARH headers, catted x-pipe, ADM CAI and a tune on stock Pzero`s!

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Old 11-15-2009, 08:52 AM   #9
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You will absolutely love the AFM delete. Worth the price of a tune all by itself.. But since this is a touch up tune if you go to the same guy I`m sure it will be very little compared to the first tune. The car will be beast!

Be sure to post your dynograph in my thread, you will have the mods I`m looking for, bolt on compilation. Hopefully its a dynojet. thanks.

http://www.camaro5.com/forums/showthread.php?t=49703
Yeah
My stock and stock tuned numbers were not all that impressive. But they are right on my money for their dyno (+/- a couple rwhp of the other L99s they've dynoed)
319 rwhp, 313 lb ft. (stock)
330 rwhp, 338 lb ft (stock with tune).

Jannetty Racing made 335 rwhp, 345 lb ft. (Bone stock with their L99). That's more than my tuned L99. But not all dyno's are created equal (even when using correction factors). So I'm sure my numbers will be a lot lower than some of the other L99's with Longtubes.

But it will be interesting to see how much HP and Torque I'm making over my stock baseline.
But to me, how my car runs at the track will be the true test of its performance.
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Old 11-16-2009, 04:44 PM   #10
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That is the exact sounds I'm looking for. Thanks for posting that vid!!
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Old 01-22-2011, 10:05 PM   #11
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You still have this video hosted somewhere? I maybe be going with a quieter exhaust setup soon and lookin at the magnaflow street w/headers or the borla touring w/headers
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Old 01-22-2011, 11:13 PM   #12
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The 2.5" system will probably be a little cheaper but I would recommend the 3" Magnaflow system. Has a nice deep rumble to it.
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Old 01-23-2011, 05:37 AM   #13
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You still have this video hosted somewhere? I maybe be going with a quieter exhaust setup soon and lookin at the magnaflow street w/headers or the borla touring w/headers
No vids
The Magnaflow Street will probably the quietest catback on the market. Without long tube headers, its ridiculously quiet. But with long tubes it sounds just right for someone not wanting an overly aggressive setup. It still sounds nice a aggressive at WOT, but at lower rpms and cruise is very quiet.

You can also go catless if you decide you want to increase the noise level a bit. But even going catless its not too loud.
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Old 01-23-2011, 09:29 AM   #14
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SGO
I have the 3in mbrp exhaust with 17/8 kooks & cats right now. Its pretty loud and sounds mean, but I might have to prepare the car better for a baby soon, so im looking for something pretty quiet inside the cabin. Do you get alot of backflow popping or drone with the headers/magnaflow street setup? Thanks
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Old 01-23-2011, 09:37 AM   #15
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The 2.5" system will probably be a little cheaper but I would recommend the 3" Magnaflow system. Has a nice deep rumble to it.
Im no worried about price so much, mostly the interior sound in the cabin. Something that wont make a newborn tone def like my mbrp/kooks setup.
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Old 01-23-2011, 10:13 AM   #16
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The Magnaflow will be good for you. Either the 2.5" or 3"....it's just that the 3" has a little more of a deeper rumble when it's at idle.

My original setup was a Muffler delete + a resonated x-pipe. I wasn't horribly loud but did have some of the drone and alot of decel pop. Once I went with LTs I went over to the 3" Magnaflow and all that went away. I haven't heard any drone and the decel popping is virtually gone. You can still hear some popping every once in a while but it very mellow and much harder to hear.

I think either one on those systems will be good to use. It's just the amount of money do you want to spend and if you want a little more deep rumble or not.

The 3" Magnaflow + LTs is a pretty common setup. You should be able to find someone in your area to listen to it in person.

Your only other options will probably be to go with the stock cat-back with your LTs or maybe a Corsa system.
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Old 01-23-2011, 10:46 AM   #17
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Video no workie!!
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Old 01-23-2011, 01:30 PM   #18
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Video no workie!!
Yeah, this is a very real old thread. The video has been gone for a long time. If I get a chance I'll try to make another one.

But trust me, the Magnaflow Street 2.5 is as quiet as it gets. You get the two regular magnaflow mufflers plus a resonated X pipe.

But as mentioned, its the perfect catback for guys with long tube headers looking to keep the noise level in check. But I like to warn people. If you don't have long tube headers you probably won't like the Magnaflow Street catback, because it will be just too quiet.
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Old 01-23-2011, 06:31 PM   #19
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SGO, I'm thinking about either Corsa or Magna Flow CB. What is the Part No. for your setup? Also, I see you picked up a little in the quarter. Is that b/c of the TB or the catback? Thinks for the infor Bro.
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Old 01-23-2011, 07:08 PM   #20
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SGO, I'm thinking about either Corsa or Magna Flow CB. What is the Part No. for your setup? Also, I see you picked up a little in the quarter. Is that b/c of the TB or the catback? Thinks for the infor Bro.
The Corsa will be a lot louder. Corsa a great exhaust (I've had Corsa catbacks on some of my previous cars), but the Corsa catback is considerably louder than the Magnaflow Street Catback.

MagnaFlow Street Series 2.5" System, Dual Split Rear Exit

Magnaflow's Stainless Steel Street Series Cat-Back for the 2010 Camaro SS 6.2L V8 L99 and LS3 features 11" Rear Oval Mufflers and Dual 4" Polished Stainless Steel Tips. Lifetime Warranty and Free Shipping!*

Manufacturer: Magnaflow
SKU: 103225 Part No: 16579

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Old 01-23-2011, 07:27 PM   #21
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Check with JDP Motorsports for some of the best pricing on Magnaflow.
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Old 01-24-2011, 11:58 PM   #22
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Is the 3inch Mag Catback much louder than the 2.5inch? I like the x-pipe with that kit. But I don't want my car loud. Chime in please!!!
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Old 01-25-2011, 05:44 AM   #23
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Is the 3inch Mag Catback much louder than the 2.5inch? I like the x-pipe with that kit. But I don't want my car loud. Chime in please!!!
It's not a lot louder, but its noticeably louder. Both have a low Magnaflow rumble to them, but the Magnaflow Street comes with the resonated X pipe that quiets the exhaust down even further.

Neither system is loud all by themselves. But especially with headers, the 3'' System is definitely louder than the 2.5 Street system.
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Old 01-25-2011, 11:38 AM   #24
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I take it the competition is louder than street then? ...curious to know how much so..
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Old 01-25-2011, 12:37 PM   #25
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SGO, did you dyno car after adding the Magna Flo setup? If so, did you realize any gain? Catback should be worth 10hp/15tq. I seen you went faster in the quarter for some reasnon. I have almost the same setup as you except for catback, TB, and Nittos. I ran a best of 12.26 at 113.58. My 60ft was 1.83 and it was very cold to us here-39 ambient temps. I m really looking at the 3inch CB if the cabin noise is tolerable-I like mean sounds, not noise. Man, thanks for your positive feedback, it really helps.
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