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

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Old 05-05-2010, 11:03 PM   #1
Jason@JacFab
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Installed the Dynomax #39494 Axleback today (w/ video)

So after much research, and watching video, after video, and listening to sound clip after sound clip I decided that the Dynomax 39494 axle back was the way to go for me. To my knowledge I'm the first "regular joe" to install, and upload a video, all I was able to find before was the video made by Dynomax...

The exhaust kit was on back order from Jeg's for 2 weeks, but finally showed up yesterday. I wasn't in a hurry as I was saving $13.50 by ordering from Jegs rather than Summit which supposedly had it in stock.

Tools required:

Hyd Jack (or lift, if you're living the dream), jackstands, sawsall (probably fastest, with the least amount of sparks), Impact gun, file, socket.

Total install time took 2 hours, although I probably spent 30-45 minutes to try and get them aligned with the rear fascia exhaust exit holes to my likings. I found the fit, was probably a little off from the factory, but I also ran out of time, so I got them as close as I could, and I will try for more another day. Being just a regular guy without a lift, it was a little tricky, I got the car up on stands, but there wasn't enough room to get the sawsall between the floor and the car to cut the OEM exhaust, so I had to jack one side of the car up past where the jack stand would reach, then lower back down and do the other side.

The only tip I have is that I found I got a little more room if I undid the factory rubber hangers towards the rear end before I cut the pipe; the instructions say to unhook after the cut.

Here is a pic of the rear of the car after the install:

You can see that the tips aren't exactly aligned with the exit holes, and that the mufflers on either side aren't sitting the same. I believe the stuff on the passenger side is "correct", it is centered, and sticks out a bit farther than the stuff on the drivers side... This weekend when I have time I will try to see if I can't get the drivers side to match the pass. side, because I think it looks better.

And now here's the video! It's not great quality, but I think you'll get the idea.



or click here


So how do I like it? It's ok. It's got the sound I'm looking for, but it needs to be slightly louder. I think the next step is to get rid of the resonators. If that doesn't do it, I guess its onto the cats
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Last edited by Jason@JacFab; 05-05-2010 at 11:32 PM. Reason: adding text
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Old 05-06-2010, 01:49 AM   #2
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Sounds good.

I had dynomax on my stroked Impala SS and loved it.

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Old 05-06-2010, 01:52 AM   #3
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sounds good, maybe an xpipe and cut the resonators out should help you get louder
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Old 05-16-2011, 11:56 AM   #4
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Jason,
Just ordered mine today from Advanced Auto Parts. Price is $320.00 shipped with a $50.00 coupn available to anyone on-line. Plus, Dynomax has a $75 deibit card / rebate for purchases Now through 10/2011.

Net Purchase = $245.00...Figured I can't go wrong at that price....

I am looking for a nice Growl that doesn't give too much cabin noise. How would you say they rank on those expectations?

Thanks
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Old 05-16-2011, 06:49 PM   #5
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Like it, like it, like it!
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Old 05-17-2011, 03:56 PM   #6
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If you want it to be louder then get rid of the cats and add headers if you can! They aren't that hard to install at all!!

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Old 05-17-2011, 03:57 PM   #7
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I like the deep throaty sound though!! If you remove the cats it will sound even better!!
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Old 03-26-2013, 11:09 AM   #8
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Do you still have this on your car?
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Old 03-27-2013, 01:52 AM   #9
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Quote:
Originally Posted by Babylamb View Post
Do you still have this on your car?
If you're asking me, yes I do still have this axle back in my car.
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Old 03-28-2013, 10:44 AM   #10
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UPDATE

I put those on last summer, but now I have headers and high flow cats and can't wait to hear how the sound will change. They were pretty mild before.


Update on sound.

I liked these mufflers when I put them on but they were not very loud. Yesterday I fired her up for the first time with the headers and hi flo cats, it went from rock 'n roll to heavy metal. What a difference!
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Old 04-05-2013, 07:05 AM   #11
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I have the Complete Dynomax cat-back exhaust. Paid $600 and I love it. It got louder after about 5000 miles.

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Old 06-30-2013, 08:22 AM   #12
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That Dynomax cat-back sounds so good, hollywood! Where did you get it from?

I am thinking about trading up to an SS soon, and I'm already looking at mods...lol.
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Old 07-23-2013, 07:44 AM   #13
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Quote:
Originally Posted by blk5genss View Post
I like the deep throaty sound though!! If you remove the cats it will sound even better!!
Whose headers did you go with?
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Old 07-23-2013, 08:03 AM   #14
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I loved my Dynomax VT! Granted mine was paired with a Cam/headers but it sounded absolutely beast, and the best part was the ZERO Drone...
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Old 07-26-2013, 10:56 PM   #15
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What's deeper and what has more drone to it? I want a non raspy deep drone free exhaust for my new setup cause I think muffler delete and cat less with my 429 is going to be ridiculous!
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Old 07-27-2013, 04:05 PM   #16
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I haven't experienced the VT system, but I imagine there is probably little to no drone... However, there was also little to no drone that I noticed with the non VT axleback.
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Old 07-28-2013, 08:42 AM   #17
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I just installed the dynomax axle back and had the exact same problem with the passenger side fitting better than the driver side. I was never able to get it right, even after taking it to a professional shop. Sounds good though.
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Old 07-28-2013, 09:08 AM   #18
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Quote:
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I loved my Dynomax VT! Granted mine was paired with a Cam/headers but it sounded absolutely beast, and the best part was the ZERO Drone...
So why did you change to the retro system?
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