15820 Catalytic Converter for Cherokee and Grand Cherokee - High Flow

Our review of the 15820 catalytic converter focuses on owners of late 90s Jeep Cherokee and Grand Cherokee models who need a direct-fit replacement that restores emissions function without major fabrication. The bottom line: this is a practical, high-flow stainless steel catalytic converter replacement designed to match original fitment numbers and come ready with gaskets and hardware, so a competent DIYer or independent shop can complete the swap quickly. It is best for federal-emissions vehicles and for those who want a durable honeycomb catalyst in a bolted and flanged assembly.

Key Features

• Direct fitment: Built to replace part numbers 15820, 52101392, 52101393, 10150, 49096, and 645422 so it matches factory connection points for the listed Cherokee and Grand Cherokee years.
• High-flow stainless steel: Heavy-duty stainless construction and sturdy welded connections resist heat and corrosion for longer service life under exhaust conditions.
• Honeycomb catalyst: Internal honeycomb design helps purify exhaust gases while maintaining flow, aiming to balance emissions control and engine performance.
• Complete installation kit: Supplied with gaskets and hardware and featuring bolted and flanged connections to simplify replacement without custom welding in many cases.
• Factory-oriented manufacture: Produced to original standard dimensions with quality control testing to provide consistent fit and function for compatible federal-emissions models.

Who It's For

This converter is intended for owners of Cherokee 1997-2000 with 4.0L or 2.5L engines and Grand Cherokee 1996 and 1998 models with 4.0L, 5.2L, or 5.9L engines who need a like-for-like catalytic replacement. It suits anyone who wants a ready-to-install unit with included gaskets and hardware and who prefers a stainless-steel, honeycomb-style catalyst for durability and flow.

It is not appropriate for vehicles registered under state-level emissions programs that restrict aftermarket catalysts, and any buyer in those jurisdictions should look for region-compliant options. Also, those requiring custom-fit or OEM-branded converters for warranty or dealer service reasons may choose an original equipment part instead.

Pros & Cons

Pros

• Direct-fit design and listed replacement numbers reduce installation time for compatible model years.
• Stainless steel body and welded connections provide durability against heat and road conditions.
• Includes gaskets and hardware so the unit is ready to mount without sourcing extra parts.
• High-flow honeycomb core maintains exhaust flow while treating emissions.

Cons

• Quality impressions are mixed among customers, so finish and fit tolerance may vary slightly between units.
• Limited to federal-emissions vehicles and not legal for use in certain states with stricter regulations.

Specifications

Compatible models	Cherokee 1997-2000 (4.0L, 2.5L); Grand Cherokee 1996, 1998 (4.0L, 5.2L, 5.9L)
Replacement numbers	15820, 52101392, 52101393, 10150, 49096, 645422
Material	Heavy-duty stainless steel
Core type	Honeycomb catalyst (high-flow)
Connections	Bolted and flanged connections; comes with gaskets and hardware
Emissions compliance	EPA compliant for federal-emissions vehicles only
Included pieces	1pcs catalytic converter with gaskets and hardware

Our Verdict

The 15820 catalytic converter is a pragmatic replacement for the specified Cherokee and Grand Cherokee years, offering durable stainless construction and a high-flow honeycomb core at a reasonable value. It is a good choice for DIY installers and independent shops needing a direct-fit, ready-to-install unit for federal-emissions vehicles, but buyers in states with stricter emissions rules should verify legal eligibility before purchase.

Frequently Asked Questions

Will this fit my Grand Cherokee 1998 5.9L?
Yes, this unit lists fitment for Grand Cherokee 1998 with 5.9L and uses the replacement numbers noted in the product description.

Does it include the gaskets and hardware needed?
Yes, the converter comes complete with gaskets and hardware and uses bolted and flanged connections for easier installation.

Is this legal in all states?
No, it is EPA compliant for federal-emissions vehicles only and may not be legal for sale or installation in states with stricter emissions regulations.