AP Exhaust 645422 Catalytic Converter - Rear
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AP Exhaust

AP Exhaust 645422 Catalytic Converter - Rear

Brand AP Exhaust 645422
Position Rear
Body Material Stainless steel
Inlet Gasket Not required
Inlet Hardware Yes
Inlet Type A 2.50" id pipe
O2 Sensor Ports 1
Outlet Gasket Not required
Outlet Hardware Yes
Outlet Type A 2.25" od pipe
Overall Length (IN) 34.13
Substrate Material Ceramic
Type Federal / epa direct-fit
Fits Jeep · 10 vehicles

Federal / EPA direct-fit. Built to OE dimensions for straightforward installation and proper fit.

Stainless steel body. Helps resist corrosion for long-term durability.

Ceramic substrate. Supports efficient converter performance with advanced loading.

$288.00Free shipping
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Order total $288.00
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Free returns within 60 days if it doesn't fit when fitment is verified.
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OE-Fit Catalytic Converter for Grand Cherokee

AP Exhaust 645422 is a Federal / EPA direct-fit catalytic converter built for precise OE dimensions and fitment. It is engineered with a stainless steel body, ceramic substrate, and integrated O2 sensor port to support proper exhaust flow on select Jeep Grand Cherokee applications.

  • Federal / EPA direct-fit catalytic converter
  • Stainless steel body for exhaust system durability
  • Ceramic substrate material
  • 1 O2 sensor port
  • Inlet: 2.50" ID pipe
  • Outlet: 2.25" OD pipe
  • Overall length: 34.13 in.
  • Inlet and outlet hardware included; gaskets not required

Fitment Details

Fits 1999-2000 Jeep Grand Cherokee, rear. Fits 1999-2000 Jeep Grand Cherokee, N/A. Fits 2001 Jeep Grand Cherokee, rear. Fits 2001 Jeep Grand Cherokee, N/A. This AP Exhaust 645422 catalytic converter is listed for Federal and California emissions configurations, with state-use restrictions noted in the fitment data.

AP Exhaust uses proprietary substrate chemistry and automated manufacturing processes to produce converters with consistent loading, OE-style dimensions, and repeatable fitment. That approach supports efficient exhaust treatment while helping keep replacement costs controlled for the application.

What This Converter Helps Address

  • Failed or inefficient catalytic converter performance
  • Check engine light concerns related to catalyst efficiency
  • Exhaust restriction from a deteriorated substrate
  • Fitment issues when replacing an OE-style rear converter on a Jeep Grand Cherokee
  • Corrosion concerns in the converter body and exhaust connection area

Installation Notes

Verify the vehicle’s emissions configuration before ordering, since this part is listed with Federal and California emissions fitment and includes state restrictions. Confirm inlet and outlet pipe sizes, O2 sensor port location, and rear-position application before installation. Use the included hardware where applicable, and follow all local and federal emissions regulations.

Quality Assurance

AP Exhaust builds this converter to exact OE dimensions using automated workstations, spinner welding equipment, and high-speed production lines. The result is a direct-fit replacement for select Jeep Grand Cherokee models that follows the listed emissions and fitment requirements.

Related reading

This part fits 10 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2001JeepGrand Cherokee4.0LL6N/ADirect Fit; (2001); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2001JeepGrand Cherokee4.7LV8RearDirect Fit; (2001); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2001JeepGrand Cherokee4.7LV8RearDirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2001JeepGrand Cherokee4.0LL6RearDirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2000JeepGrand Cherokee4.7LV8RearDirect Fit; (Federal Emissions); Federal Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME and NY. Restrictions may apply in other states. Check with your state authority for details.
2000JeepGrand Cherokee4.7LV8RearDirect Fit; California Emissions; California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME, NY. Restrictions may apply in other states. Check with your state authority for details.
2000JeepGrand Cherokee4.7LV8N/ADirect Fit; Federal Emissions; Federal Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME and NY. Restrictions may apply in other states. Check with your state authority for details.
1999JeepGrand Cherokee4.7LV8RearDirect Fit; California Emissions; California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME, NY. Restrictions may apply in other states. Check with your state authority for details.
1999JeepGrand Cherokee4.7LV8RearDirect Fit; (Federal Emissions); Federal Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME and NY. Restrictions may apply in other states. Check with your state authority for details.
1999JeepGrand Cherokee4.7LV8N/ADirect Fit; Federal Emissions; Federal Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME and NY. Restrictions may apply in other states. Check with your state authority for details.