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Magnaflow 23909 Catalytic Converter Issues

Old Apr 27, 2015 | 04:48 PM
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Magnaflow 23909 Catalytic Converter Issues

Uhg, seems like they welded the converter in the wrong orientation to the pipe. The O2 sensor won't fit. Of course no one is answering their phone.

Anyone else have this issue? Need to pass emissions and this is a setback...


Attached Thumbnails Magnaflow 23909 Catalytic Converter Issues-cat.jpg  
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Old Apr 27, 2015 | 04:58 PM
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Why would anyone else have this issue? This was a custom job that got screwed up, get it fixed. Automatic?
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Old Apr 27, 2015 | 05:03 PM
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Originally Posted by 9krpmrx8
Why would anyone else have this issue? This was a custom job that got screwed up, get it fixed. Automatic?
Yes, Automatic.

Custom job? Not sure about that.

So far not impressed, they didn't even ship a complete set of hardware. Luckily I have a scrounge bin.

This is "Magnaflow", not a shoddy "custom" garage build.
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Old Apr 27, 2015 | 05:06 PM
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Wait, did they ship you the complete pipe after welding in one of their cats? Or did you have a shop weld it in?


The former is rather rare, it wouldn't shock me if they messed it up, not being RX-8 specialists.
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Old Apr 27, 2015 | 05:12 PM
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Originally Posted by RIWWP
Wait, did they ship you the complete pipe after welding in one of their cats? Or did you have a shop weld it in?


The former is rather rare, it wouldn't shock me if they messed it up, not being RX-8 specialists.
It was a complete system. Was suppose to be bolt and play...

Magnaflow 23909 Mazda RX-8 Catalytic Converter Direct Fit 49 State (Exc.CA)
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Old Apr 27, 2015 | 05:29 PM
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Oh, you bought it this way..................My bad.
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Old Apr 27, 2015 | 05:30 PM
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Where did you purchase it? It is listed to work with the Automatics?
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Old Apr 27, 2015 | 05:33 PM
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Originally Posted by 9krpmrx8
Where did you purchase it?
Looking at the packing slip, came from Canadian Catalytic, Woodbridge Ontario.

I'll keep calling them tomorrow. Hopefully I can get somewhere. Worst case I'll have to find a shop here in Houston and have it cut and re-welded$$$.
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Old Apr 27, 2015 | 05:33 PM
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Nope it is only listed to work with M/T equipped RX-8's.

MagnaFlow Catalytic Converters - 49-STATE & CANADA Catalytic Converters For Trucks, Suv's, American Muscle, Diesel, & Sport Compact Vehicles
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Old Apr 27, 2015 | 05:36 PM
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Originally Posted by 9krpmrx8
Where did you purchase it? It is listed to work with the Automatics?
Excuse my ignorance, why would a car with Automatic transmission and Manual have different Catalytic converters? If I read correct the automatic makes less power so I would think there would be less issues?
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Old Apr 27, 2015 | 05:38 PM
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Because the manual trans takes up far less room.
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Old Apr 27, 2015 | 05:39 PM
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Yes, I see that now. However the web site from where I purchased did not specify manual transmission only. Not cool, so it seems I'll have to get it cut and rotated.
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Old Apr 27, 2015 | 05:39 PM
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This is a stock pipe, you can see the O2 sensor location is about the same as yours. Magnaflow makes good stuff so I doubt it was a mistake.

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Old Apr 27, 2015 | 05:43 PM
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Yes, much more room with the manual. If I was a bit more educated would of only purchased the Catalytic portion and had it welded to the stock pipe.

Had plans of gutting the old Cat and re-installing after I passed the emissions.
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Old Apr 27, 2015 | 05:48 PM
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Well, hopefully they take it back. You can try one of these as well but I am not sure if the car would throw a code or not because of it. It also might still be a tight fit. The thread pitch is a standard metric thread pitch, I am sure any hydraulic hose/fitting supplier could get you something that would work as well.

Amazon.com: 90 Degree Angled O2 Check Engine Light CEL Fix Oxygen Spacer Exhaust Extension: Automotive Amazon.com: 90 Degree Angled O2 Check Engine Light CEL Fix Oxygen Spacer Exhaust Extension: Automotive

Last edited by 9krpmrx8; Apr 27, 2015 at 05:51 PM.
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Old Apr 27, 2015 | 05:52 PM
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magnaflow does make "direct fit" Cat for our 8, it looks like Mangnaflow (or the factory that actually makes it) screwed it up.

both AT and MT uses the same cat.

Either return or cut it & weld urself, but if it's me I would just return it
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Old Apr 27, 2015 | 05:59 PM
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Originally Posted by 9krpmrx8
Well, hopefully they take it back. You can try one of these as well but I am not sure if the car would throw a code or not because of it. It also might still be a tight fit. The thread pitch is a standard metric thread pitch, I am sure any hydraulic hose/fitting supplier could get you something that would work as well.

Amazon.com: 90 Degree Angled O2 Check Engine Light CEL Fix Oxygen Spacer Exhaust Extension: Automotive
Thanks, I'm going to try this first before cutting and rotating the Cat. Really appreciate the help. I'll keep everyone posted if I was successful passing emissions in this configuration.
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Old Apr 27, 2015 | 05:59 PM
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TX

Originally Posted by nycgps
magnaflow does make "direct fit" Cat for our 8, it looks like Mangnaflow (or the factory that actually makes it) screwed it up.

both AT and MT uses the same cat.

Either return or cut it & weld urself, but if it's me I would just return it
Yeah their website says MT only. But maybe the fitting was installed too far forward. Either way that **** ain't gonna work. Honestly I refuse to work on AT RX-8's (yeah I'm a snob) so I could not tell you if the midpipes are the same or not.
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Old May 2, 2015 | 07:09 AM
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Changed my mind, had the hole relocated.

Lets see if the emission light stays off now.
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Old May 30, 2015 | 05:36 AM
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All of the 23909's the hole is in the same spot and wrong my friend had issues with his being turned enough when welded at the factory that the O2 sensor was rubbing the underneath even on a manual. We tapped and welded it in farther back. Nobody I know has got a complete set of hardware with one.
I have the Magnaflow 49150 on my auto and have had no problems. Looking at them side by side the only difference I see is $300 and the o2 sensor hole is a couple inches farther back on the 49150.
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Old Mar 20, 2017 | 09:31 PM
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What did you ended doing

Originally Posted by OffshoreEng
Uhg, seems like they welded the converter in the wrong orientation to the pipe. The O2 sensor won't fit. Of course no one is answering their phone.

Anyone else have this issue? Need to pass emissions and this is a setback...


I have same issues what was your outcome
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Old Mar 21, 2017 | 08:31 PM
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The Magnaflow cat is M/T ONLY! If you have an auto, return it.
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Old Mar 22, 2017 | 07:49 AM
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OP, if you are still around, please let us know this cat is holding up. Magnaflow cats have not lived long in this car AFAIK, but more data points are always needed.
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Old Mar 22, 2017 | 12:35 PM
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Yes, if there is experience about longevity of these cats, please post about them.
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