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Old 04-21-2015, 11:12 AM   #1
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Magna flow street series axle back

Can someone post a video or sound clip of these in some different driving situations.

I have had the roush ab for about 5 months now and I'm very disappointed. While they sound great they r already rusted. I parked the car all winter long it's never seen snow or salty roads and its parked in a garage. I'm blown away by this. Bought them from American muscle and they looked great but not work long. Ya there under the car so who cares rite.? I do it's driving me insane and I want to switch to something different.

Can't seem to find another clip out there besides what am has on there site.


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Old 04-21-2015, 11:19 AM   #2
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The Roush mufflers have a three year warranty. I would start off by contacting American Muscle. Alex here on the forum should be able to point you in the right direction.
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Old 04-21-2015, 11:21 AM   #3
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I would feel a lot better if they lasted three years before rusting. But there stainless. Good stainless will never rust. Thank you though. I'll get in touch and see what they say


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Old 04-21-2015, 12:35 PM   #4
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I would feel a lot better if they lasted three years before rusting. But there stainless. Good stainless will never rust. Thank you though. I'll get in touch and see what they say


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Apparently they are made of 409 SS with tips of 304 SS
"Grade 409 stainless steels have excellent resistance to exhaust gas and atmospheric corrosion, superior to that of 410 martensitic grades with 12% chromium and 3CR12. However, the corrosion resistance is lower than that of grade 430 steels containing 17% chromium. The surface of grade 409 steels is liable to mild corrosion, which limits the usage of steels for decorative purposes."
Looks like Borla uses the more expensive 304 SS.
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Old 04-21-2015, 12:44 PM   #5
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I would get magnapacks if you like the sound of the roush
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Old 04-24-2015, 09:26 PM   #6
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Magnaflow has a polished stainless steel Universal Muffler that is a fraction of the cost of Axlebacks. Love mine. Nice deep rumble and not too loud.


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Old 04-25-2015, 12:40 AM   #7
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Midnight could you post a video for me? I have thought about running those at a 3" and just cutting my stock exhaust up for the brackets and welding it up myself. I've always ran magnaflow in the past and always loved it. Idk y I tried roush on this car. Probably just because it's roush but I will never buy another junk exhaust from them again. I'll stick to my old faithful of Magna flow if they sound good on a v6


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Old 04-25-2015, 01:12 AM   #8
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Yeah I will try and record one tomorrow for you. Mine were $380 installed but you can get them on the Internet yourself at $115 each and weld your own brackets. But you'll need the flange attachment pipe too.


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Old 04-25-2015, 01:21 AM   #9
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Here's how they look.Click image for larger version

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Old 04-25-2015, 05:54 AM   #10
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Quote:
Originally Posted by 20prima10 View Post
Can someone post a video or sound clip of these in some different driving situations.

I have had the roush ab for about 5 months now and I'm very disappointed. While they sound great they r already rusted. I parked the car all winter long it's never seen snow or salty roads and its parked in a garage. I'm blown away by this. Bought them from American muscle and they looked great but not work long. Ya there under the car so who cares rite.? I do it's driving me insane and I want to switch to something different.

Can't seem to find another clip out there besides what am has on there site.


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Op, can you post some pics of the corrosion areas of your Roush if possible? I've had some rust where the hanger is welded to the actual muffler as they clearly didn't use stainless steel wire to weld the two together causing some rust in that area. I also noticed this in the first few months of owning them. While my tips and mufflers still look good its still a little disappointing that I've had some dots of rust on them also showing they do have a pretty high carbon content. If I paid 700-800 for these I'd be pretty pissed but I guess at under 5 bills we get what we pay for lol. Still disappointing in that aspect though.
Btw if you like the sound of Roush, streets are on the other end of the sound spectrum, not bad at all just a completely different sounding AB.

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Old 04-25-2015, 07:22 AM   #11
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for the cost/hassle of replacing exhaust which sounds like is surface rusting in a spot you can't see you can instead buy lots of beer (or whatever medication you prefer).
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Old 04-25-2015, 02:37 PM   #12
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OP, I paid $ 479.09 for the Street Axle Backs from Planet Magnaflow in January (just make an offer a little lower than that and they'll counter offer/give you a coupon code). You can also ask AM if they will price match. In my case they would have but I had to pull the trigger on the Planet Magnaflow offer before AM answered me. Think of it that way: When/if you sell ur car, you can always put the stock axle backs back on and sell the streets. Under these circumstances, getting the welded ones for a total of $ 380 does not make sense to me.
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Old 04-25-2015, 03:59 PM   #13
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Magna flow street series axle back

Saving a $100.00 makes sense to me. And I needed part of the pipe replaced due to being rear ended. But then I'm never selling my car either. 20Prima10 my camcorder isnt working but I made this for you.

BTW you can always have the muffler shop make you flanges that bolt up and still take them off if the need should arise. I just checked Planet Magnaflow and the Street Series Axleback for the 3.7 are $684.42..good job getting them to knock 200.00 off. Must be a high profit margin.
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Old 04-26-2015, 07:12 AM   #14
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I can do all the work on the exhaust myself all I need is the mufflers lol. Just deciding what ones I want to go with. I do like the roush but I'm looking for a deeper sound. Will never be a v8 and that's not what I'm going for. I just want a deeper sound to it. I'll attach a pic of the roush exhaust. It's not bad yet but it's under 6 months old and I know at 3 years it wud need replaced it it made it that long. Click image for larger version

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Old 04-26-2015, 07:15 AM   #15
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Thank you for the video. I will probably bump up to 3" mufflers. It's should remove some of the popping.


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Old 04-26-2015, 09:26 AM   #16
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Magna flow street series axle back

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You're welcome.
Strangely it doesn't pop while driving. Could that rust be from salt on the roads in winter time?
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Old 04-26-2015, 09:45 AM   #17
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Not from the salt. I do live in Michigan but I have summer cars and winter cars. My summer cars only see dry roads and pavement 5 months a year. I always wait until after a few good rains to know the salts off the road and store them well before snow. There all garage kept and never see rain. Roush did use stainless for the muffler but they used cheap 409. 409 stainless has a high carbon content there for it rusts. Had I known ahead of time they used 409 I wouldn't have got it.


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Old 04-26-2015, 10:38 AM   #18
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Magna flow street series axle back

Well that sucks. Magnaflow aren't all perfect as shown in pictures either. The welds are dis colored from the heat. The set I bought 11 years ago for the PT Cruiser I had were flawless.
Maybe some heat resistant paint can help out those Roush for awhile.


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Old 04-26-2015, 11:11 AM   #19
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Dude...
A beginner's guide to modifying your V6

I got videos on Youtube of my setup as well:
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Old 04-26-2015, 01:26 PM   #20
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Dude...
A beginner's guide to modifying your V6

I got videos on Youtube of my setup as well:
Was that the sound of thunder or was it an 8?
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Old 04-26-2015, 09:25 PM   #21
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OP stick with 2.5" mufflers, 3" is going to be an absolute overkill for your 3.7! Bigger is not always better
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Old 04-26-2015, 09:29 PM   #22
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I just want to do 3"mufflers back. Isn't that what everyone does with the gt500 mufflers?


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Old 04-27-2015, 07:05 AM   #23
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I think bazinga thinks you want to do 3" from the cats back. But 3" from muffler back sounds good.


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Old 04-27-2015, 07:43 AM   #24
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Ya I just want to do 3" mufflers back. I'm going to cut off the connection from my stock mufflers and use them and just run 3" mufflers out.


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Old 04-27-2015, 10:56 PM   #25
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Gt500s having 2.75" piping, not 3". I doubt if 3" is going to make any significant difference in terms of performance/sound.. Be a little bit deeper but thats about it. On the contrary you might lose a little back pressure
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Old 04-28-2015, 04:43 AM   #26
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Maybe it's 2.75 than. My plan was to run the gt500 set up with magnaflow instead


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Old 04-30-2015, 10:12 AM   #27
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Magna flow street series axle back

I don't know what the dynos show with the GT500 setup on the 3.7 but wouldn't you lose low end and gain top end?


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Old 04-30-2015, 11:01 AM   #28
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In theory yes. Have not seen a dyno to prove it but everyone says you do. I've built Chevy 350s before and dyno proven never lost low end going up in size unless I hit 4". But those were high performance 500-900hp motors. So who knows. Every motor has its drop off point


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Old 05-01-2015, 04:25 PM   #29
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Quote:
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Was that the sound of thunder or was it an 8?
LOL, thanks. Its all in the Shortie headers, H pipe and Mag Streets.
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Gt500s having 2.75" piping, not 3". I doubt if 3" is going to make any significant difference in terms of performance/sound.. Be a little bit deeper but thats about it. On the contrary you might lose a little back pressure
No back preasure loss....The factory Cats choke the engine so much that most exhaust mods dont change the performance too much for better or worse.


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Maybe it's 2.75 than. My plan was to run the gt500 set up with magnaflow instead


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Please try it out and let us know how it works. I know a guy who used a full GT exhaust from the cats back and it didnt change his performance too much.
Also the 2011 GT has 2.5" that goes to 2.75" then back down to 2.5" in the mid pipe and i believe its 2.5 in the overaxels. The GT 500 is 2.75" but it stays 2.75" throughout the whole exhaust rather than bottle necking like the V6 or the GT exhausts do.
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