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A direct-fit rear catalytic converter for the 1999-2001 Jeep Grand Cherokee WJ with the 4.0L inline-six. MagnaFlow builds it from stainless steel with a ceramic honeycomb catalyst and a spun body, and it bolts to the factory flange with an oxygen sensor port already in place. It is a federal EPA-compliant replacement, not a California-legal one, so check your state's rules before buying. Compared with a universal weld-in converter, the direct-fit shape saves cutting and fabrication; compared with a dealer OE unit, it is lighter and simpler to install yourself.
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Lowest price we've seen: $343.74 on Nov 9 at Amazon. Tracked across 14 stores since Nov 9.
Owners of older Jeeps generally report the unit bolts up to the factory flange and quiets a failed converter, and many praise the stainless build. Complaints center on fitment quirks and on the California restriction catching buyers out.
