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Check engine light on?
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Emissions test coming up?
This A1 Exhaust Y-pipe cat set is exactly what that old RX300 needs.
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Fits 1999 through 2003 Lexus RX300 with the 3.0L V6.
It's a direct bolt-in, no drilling, no universal headaches.

Made in Canada with a ceramic substrate, includes all mounting hardware.

EPA certified, so you're street legal in most states—just not California, sorry.
5-year warranty, which is honestly pretty great for converters.

Brand new, never installed, uncoated finish.

Don't pay dealer prices for the same thing.
This is the fix.
4 out of 5