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Magnaflow Catback issue

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Old 11-10-2009, 09:34 PM
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Default Magnaflow Catback issue

Has anyone ever had an issue with a new Magnaflow Catback being clogged or something? I just had my car dynoed and the car pinged like crazy. We backed off the timing to 20 degrees to combat that and only made 360rwhp. We opened up the cutouts with no other changes and it gained 100 more hp. Once we added the timing back in it was close to 500rwhp. I never had any issues with my Corsa except for being too loud. I was going to contact Magnaflow tomorrow to see what they said but I wanted to see if anyone else experienced this before. The motor is a 416 stroker with a 4L60e.
Old 11-11-2009, 12:54 PM
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i would think the the cats would be clogged before the exhaust... i would check that out first...
Old 11-11-2009, 01:25 PM
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maybe someone put a banana in your tail pipe. lol
Old 11-11-2009, 05:27 PM
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I've never heard of such a thing, but if there was a manufacturing failure and the inner tubing was absent, dislocated, or collapsed, sending the exhaust into a mass of fiberglass packing, I can see how your kind of problem might occur.
Old 11-11-2009, 05:31 PM
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Wow, I was going to look into a Magnaflow for my 383 turbo build. Even though I was going to get a cutout, this is kinda deterring me from getting one. Keep us updated please.
Old 11-12-2009, 07:03 AM
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I guess one of my Cats from my Kook's y-pipe took a dump in my exhaust. This is all what came out . It was so compacted in there I am suprised it even ran...
Attached Thumbnails Magnaflow Catback issue-muffler.jpg  
Old 11-12-2009, 07:38 AM
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Whoa! Thats crazy stuff
Old 11-12-2009, 06:49 PM
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Originally Posted by 2001 Pewter WS6
I guess one of my Cats from my Kook's y-pipe took a dump in my exhaust. This is all what came out . It was so compacted in there I am suprised it even ran...
Hence why I'll never use cats. I've had them come apart in the past and seen others go through the same crap.
Old 11-14-2009, 08:31 AM
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WOW! I've heard of them plugging but not coming apart like that.
Old 11-14-2009, 08:58 AM
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Originally Posted by 2001 Pewter WS6
I guess one of my Cats from my Kook's y-pipe took a dump in my exhaust. This is all what came out . It was so compacted in there I am suprised it even ran...
Hey was that a high flow cat like the stuff the from the factory on your car or was that actually kooks creamic metallic cat? Of do you have a picture of the cat that stuff came out of?




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