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The MagnaFlow 55323 is a direct-fit replacement catalytic converter for cars, built from stainless steel with mandrel-bent tubing and a single laser-fusion weld. It bolts on with the included gaskets and hardware, so no cutting or welding is needed. It meets Federal EPA requirements for OBDII vehicles with Federal emissions systems, but it is not legal for California or other CARB states. Compared with universal converters, it fits and installs faster; compared with OEM units, it is a lower-cost option that owners say sounds slightly louder and may not match factory longevity.
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Store links may earn us a commission. Some prices via Klarna.
Lowest price we've seen: $638.00 on Nov 9 at Walmart. Tracked across 4 stores since Nov 9.
Owners generally report a straightforward bolt-on install and good build quality for the money. Complaints center on fitment on some vehicles, a slightly louder exhaust note, and shorter life than OEM.
This is a direct-fit catalytic converter for cars and trucks with Federal/EPA emission systems. It bolts in without cutting or welding. It meets or exceeds Federal EPA emissions requirements for OBDII Federally registered vehicles.
The converter is built from 16 gauge 409 stainless steel tubing, which resists corrosion. It has 308 stainless steel MIG welds, 410 stainless steel hangers, a ceramic substrate and an aluminized steel heat shield. A single laser fusion weld reduces the chance of a leak. The tubing is free-flowing and mandrel-bent, and the compact, low-mass design allows greater thermal efficiency.
The inlet is a welded flange and the outlet is a slip fit. Vehicle information is required to guarantee fit. Listed fitment includes the Ford F250 Super Duty 3/4 Ton Pickup 2000-2004, the F450 Super Duty 1 1/2 Ton Truck and the Excursion.
