Will this fit my Jeep Grand Cherokee?

It is built for the 2002–2004 Grand Cherokee with the 4.7L V8. It is not listed for the 4.0L or other model years.

Is it legal in California?

Yes. It is CARB compliant and approved for legal use in California and CARB-restricted states on the listed vehicles.

Do I need to weld it on?

No. It is a direct-fit unit that bolts in place of the factory converter with the proper tools.

Which OE part numbers does it replace?

It interchanges with 52080358AA, 52080378AB, 52080378AC, 52101235AA and 52101235AB.

Will it keep the check engine light off?

MagnaFlow designs it to meet or exceed CARB requirements, and owners report the light stays off after installation.

The converter itself. Gaskets and mounting hardware are typically not included, so check your old hardware before starting.

What do buyers say about the Magnaflow 458000 Direct Fit Catalytic Converter?

Rated 4.6 out of 5 from 36 ratings.

Where can I buy the Magnaflow 458000 Direct Fit Catalytic Converter?

17 stores we checked sell it, including GTR Auto, Alliance Racing, Amazon, AutoZone, Walmart.

Magnaflow 458000 Direct Fit Catalytic Converter

Q: Where is the Magnaflow 458000 Direct Fit Catalytic Converter cheapest?

At Alliance Racing, for $1,164.60, 20% under what the other stores charge, as of our latest check.

Best price now

$1,164.60at Alliance RacingChecked 1 h ago

20% under what the other stores charge

Compared across 16 stores. Prices are checked against each store and labelled with when.

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What reviewers say

4.6 / 536 ratings

Owners rate it highly, with most praise going to the exact fit and the check engine light staying off after installation. A few mention that the job is still physical work and that hardware on older Jeeps can be stubborn.

What people mention

FitPraisedOwners say it mounts like the factory converter with no cutting or welding.
Check engine lightPraisedBuyers report the light stays off after the swap.
Build qualityPraisedThe stainless steel construction is described as solid and corrosion resistant.
InstallationMixedMost get it bolted on, but rusted hardware on older Jeeps makes the job harder.
ValueMixedSome find it expensive next to universal converters, though it avoids fabrication.

About the Magnaflow 458000 Direct Fit Catalytic Converter

The MagnaFlow 458000 is a California-grade, CARB-compliant direct-fit catalytic converter for the 2002-2004 Jeep Grand Cherokee with the 4.7L engine. It is designed to meet or exceed California Air Resources Board requirements. It has had additional testing for legal use in California and CARB-restricted states on the listed vehicles.

It replicates the OE design and flow dynamics to maintain factory performance and fuel efficiency. The tubing is 16 gauge 409 stainless steel. The welds are 308 stainless steel MIG welds, and a single laser fusion weld reduces the chance of a leak. The compact, low-mass design allows greater thermal efficiency. The collector is precision stamped, and the OE-sized barbed hangers are 410 stainless steel to help reduce noise and vibration.

It bolts on with no cutting or welding required. Gaskets and essential hardware are included in the box.

Fits

2002-2004 Jeep Grand Cherokee 4.7L

Fit type

Direct-fit, vehicle specific

Emission

California, CARB compliant

OE interchange

5208 0358AA, 5208 0378AB, 5208 0378AC, 5210 1235AA, 5210 1235AB

Format

Pre-catalytic converter and main catalytic converter

Converter quantity