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Old 02-19-2011, 06:05 PM   #1
SubaruImpreza_power
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Question doughnut gasket question

So it took me 2 years to noticed why the car i got from a private sale had a larger then normal gasket on it.. long story short the little pipe extension from the flange on the stock cat was I guess gone.. So when I went to replace the gasket one day it never sealed.. OK

So I ordered my cat converter and I have a question should the gasket slip over this part or is it correct shown here?

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Old 02-19-2011, 07:47 PM   #2
Subyroo2.5
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It should slip over that part. those gaskets suck. if you can have a muffler shop weld a flat flange on each side so you can just use a flat exhaust gasket.
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Old 02-19-2011, 07:53 PM   #3
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it's odd I'd hate to have to cut it up because I'm not really looking to spend extra money on something so small.

in this case the gasket is about 2 mm too thick to fit around the pipe.
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Old 02-20-2011, 12:30 PM   #4
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yeah those chicken wire gaskets are terrible... they never seem to compress properly, I've gone through about 3 of them and every time I had to use some muffler cement to seal it up. You can get a set of calipers and measure the interior diameter, the thickness and the outer diameter... that looks like a 2.5" gasket, in which case the solid graphite gasket from the STI might work. They're pretty cheap to. Also vibrant makes a few donut gaskets as well that might fit.
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Old 02-20-2011, 01:09 PM   #5
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it should be a 2.5" gasket but I will check with the calipers it's just crazy.
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Old 02-20-2011, 01:30 PM   #6
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Check with your local Subaru dealer parts department. Subaru changed the size of those donut gaskets a few times in the 90's. Just order up a correct one. It's cheaper than having a new flange welded on, and will seal perfectly.
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Old 02-20-2011, 02:07 PM   #7
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I gasket i have is the part number they have for a 95 legacy L.. only thing is I take a little a little off the gasket so it will fit.
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