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The Walker CalCat is a direct-fit replacement catalytic converter for vehicles from the mid-1990s onward, with a ceramic honeycomb substrate and a stainless-steel body. It bolts on with a three-bolt welded flange and includes an oxygen sensor port, so it fits OBDII and older non-OBD cars that need a stock-style replacement. It is a stock-replacement part, not a performance upgrade: it meets the emissions requirements of the vehicle it is listed for, and Walker's own fit notes say some applications need modification. Owners value the direct fit and factory-style flanges, but the lack of included hardware and gaskets is a common complaint.
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Lowest price we've seen: $302.78 on Nov 9 at Amazon. Tracked across 13 stores since Nov 9.
Owners mostly report a clean bolt-on fit and a working check-engine light fix on stock vehicles. Complaints center on missing gaskets and hardware and on fit issues on some applications.
