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Removing catalytic converter

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Old 05-16-2013, 03:51 PM
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Jetdriver69
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Default Removing catalytic converter
My cat is buzzing and I think the interds are going bad. Anyway, if I cut out the cat and replace it with a straight pipe is there a source for this with a o2 sensor welded in? Thanks
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Old 05-16-2013, 03:56 PM
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rgs944
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What kind of car do you have?
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Old 05-16-2013, 03:58 PM
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Lizard928
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The O2 sensor is pre-cat on all 928s, so just cut it between the O2 and cat, and you're good to go!
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Old 05-16-2013, 04:05 PM
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Kiln_Red
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Sounds like a prime opportunity to replace the cat with a Motorsport of Utah x pipe.. depending on what kind of car you have.
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Old 05-17-2013, 08:58 AM
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Jetdriver69
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Sorry, my bad. I have a 82 5 speed. I just changed the three exhaust gaskets while I was under the car and now it is buzzing. I will check all bolts before doing any cutting.
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Old 05-17-2013, 09:22 AM
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hacker-pschorr
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Do it the right way. Install manifolds from an 85/86 along with this Y-Pipe:

https://rennlist.com/forums/928-foru...l-y-pipes.html

The absolute best power gain for the money with a 16V 928.
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Old 05-17-2013, 12:26 PM
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The '85/6 manifolds are a good mod. Be aware the Y-Pipe won't fit right with the later manifolds. The right side will need to be extended.
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