99 ULEV(F23A4) catalytic converter on LEV(F23A1) Accord?

allen1040

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My cat on my 1999 5spd Accord sedan 2.3 LEV (F23A1) has kicked the bucket after 265,000 miles. The resonator pipe and muffler are in pretty bad shape too, and I've already replaced the flex pipe. I can get the cat, resonator, and muffler off of a 99 5spd Accord sedan ULEV (F23A4) for free.
Would the ULEV cat be a direct fit?
Would a CEL come on becuase of the different cat even if I used the O2 sensors for my car?
If everything else worked, would there be any performance issues because of the more restrictive ULEV cat?
Thanks in advance for any help.
 

Sino

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Shouldn't have any problems, ULEVs use the same engine, just a bit more restrictive exhaust system. Not sure if the 02 sensor will mind but I doubt it.

Edit: seems the A4 has slightly different cylinder head and manifolds but I don't see an issue with a couple of swapped exhaust pieces as long as you use an A1 sensor.
 
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agginline86

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downstream O2 sensor shouldn't be affected. Any cat for our gen accords will work and it will be a direct fit. As far as performance goes, I'd doubt it'll be any different.
 
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