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AP Exhaust 645358 Catalytic Converter - RearOE Quality 60-Day Returns
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Part #: 645358

AP Exhaust 645358 Catalytic Converter - Rear

Rear
⚙️ 7 vehicles fit this part
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✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Jeep, Wrangler
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Direct-Fit Catalytic Converter for Jeep Wrangler

AP Exhaust 645358 is a Federal / EPA direct-fit catalytic converter built for exact OE dimensions and fitment. It is engineered for 2000-2003 Jeep Wrangler rear applications and 2000-2002 Jeep Wrangler configurations without an O2 sensor in the converter.

Key Features

  • Stainless steel body for corrosion resistance
  • Ceramic substrate material for efficient exhaust treatment
  • Federal / EPA direct-fit design
  • 3-bolt welded flange inlet
  • 2-bolt loose flange outlet with male ball
  • Inlet gasket included
  • No O2 sensor ports
  • 23.5-inch overall length

Detailed Product Overview

AP Exhaust part number 645358 uses ARISTO substrate chemistry and advanced manufacturing methods to support consistent converter loading and OE-style fitment. The stainless steel shell and ceramic substrate are matched to the converter’s direct-fit layout, helping maintain the original exhaust routing on Jeep Wrangler rear main converter applications. This part number 645358 is built for drivers replacing a worn or restricted converter on a Jeep Wrangler while keeping the factory-style flange configuration.

Compatible With 2000-2003 Jeep Wrangler, rear, and 2000-2002 Jeep Wrangler, no O2 sensor in converter, after 01-24-00 production where noted. This AP Exhaust catalytic converter is also referenced by part number 645358 for the same application.

What It Helps Address

  • Check engine light concerns related to catalytic converter efficiency
  • Restricted exhaust flow from a deteriorated converter
  • Failed emissions testing caused by converter wear
  • Exhaust leaks at the converter flange connection
  • Noise or odor issues from a damaged converter core

Installation Notes

Verify the vehicle’s emissions configuration, production date, and rear converter layout before ordering. This unit uses a 3-bolt welded flange inlet and a 2-bolt loose flange outlet with male ball, and it does not include O2 sensor ports. Inlet gasket is included; outlet gasket is not required. Confirm state and local emissions restrictions before installation, especially for vehicles licensed in CA, CO, ME, and NY.

Quality Assurance

AP Exhaust builds this converter to OE dimensions using automated workstations, spinner welding equipment, and high-speed production lines for consistent fitment and manufacturing control. The ARISTO substrate design is used to support efficient converter loading and dependable emissions-system service.

BrandAP Exhaust
Part Number645358
Body MaterialStainless steel
Inlet GasketYes
Inlet HardwareNone
Inlet Type A3 bolt welded flange
O2 Sensor PortsNone
Outlet GasketNot required
Outlet HardwareNone
Outlet Type A2 bolt loose flange w/ male ball
Overall Length (IN)23.5
Substrate MaterialCeramic
TypeFederal / epa direct-fit

This part fits 7 vehicles. Search below:

YearMakeModelDrive TypeLitersCylindersPositionNotes
2003JeepWrangler4.0LL6RearDirect Fit; Main Conv., w/o O2 Sensor; 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.
2002JeepWrangler4WD4.0LL6N/ADirect Fit; (w/o O2 sensor in conv.); 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.; (after 01-24-00 production)
2002JeepWrangler4.0LL6RearDirect Fit; Main Conv., w/o O2 Sensor; 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.
2001JeepWrangler4WD4.0LL6N/ADirect Fit; (w/o O2 sensor in conv.); 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.; (after 01-24-00 production)
2001JeepWrangler4.0LL6RearDirect Fit; Main Conv., w/o O2 Sensor; 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.
2000JeepWrangler4WD4.0LL6N/ADirect Fit; (w/o O2 sensor in conv.); 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.; (after 01-24-00 production); (after 01-24-00 production)
2000JeepWrangler4.0LL6RearDirect Fit; Main Conv., w/o O2 Sensor; 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.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

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