AP Exhaust 644021 Catalytic Converter - Rear
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AP Exhaust

AP Exhaust 644021 Catalytic Converter - Rear

Brand AP Exhaust 644021
Position Rear
Body Material Stainless steel
Clamp Qty 1
Inlet Gasket Yes
Inlet Hardware None
Inlet Type A 2 bolt welded flange
O2 Sensor Ports None
Outlet Gasket Not required
Outlet Hardware Yes
Outlet Type A 2.375" od pipe
Overall Length (IN) 24
Substrate Material Ceramic
Type Federal / epa direct-fit
Type Federal / epa direct-fit undercar
Fits Toyota · 14 vehicles

Direct-fit design. Built to exact OE dimensions for straightforward installation.

Stainless steel body. Resists corrosion for dependable exhaust service.

Ceramic substrate. Uses proprietary chemistry for efficient converter performance.

Cross-references 17420-28710 for the same application. See all 1.

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OE-Fit Catalytic Converter for RAV4

AP Exhaust 644021 is a Federal / EPA direct-fit catalytic converter built for OE-style fitment and emissions performance. It uses a stainless steel body, a ceramic substrate, and exact-dimension manufacturing to support proper installation on select Toyota RAV4 applications.

Fits 2006-2012 Toyota RAV4, N/A and Fits 2006-2012 Toyota RAV4, Rear. This AP Exhaust catalytic converter is also referenced by part number 644021 for fitment research and ordering.

Key Features

  • Stainless steel body for corrosion resistance
  • Ceramic substrate material
  • Federal / EPA direct-fit design
  • 2-bolt welded flange inlet
  • 2.375" OD pipe outlet
  • Inlet gasket included
  • Outlet hardware included
  • No O2 sensor ports
  • 24-inch overall length

Product Details

AP Exhaust uses proprietary substrate chemistry and modern automated manufacturing to produce converters with efficient catalyst loading and OE-style dimensions. For Toyota RAV4 owners, that means a direct-fit replacement that aligns with the original exhaust layout and supports proper exhaust flow through the catalytic section. The 644021 is listed for 2006-2012 Toyota RAV4 applications, including rear-position coverage where the OE system uses a welded assembly and requires welded assembly 50020 to complete installation.

This part cross-references 17420-28710 for the same application.

Common Issues This Part Can Address

  • Failed emissions test due to a worn catalytic converter
  • Check engine light related to catalyst efficiency faults
  • Exhaust restriction from a deteriorated substrate
  • Rust or damage to the original converter body
  • Fitment problems when replacing an OE welded assembly

Installation Notes

Verify the vehicle’s emissions configuration before ordering. This converter is listed for Federal and California emissions on the covered Toyota RAV4 applications, but it is not for sale or use on vehicles licensed in CA, CO, ME, or NY; restrictions may apply in other states. For rear applications, welded assembly 50020 is required to complete installation. The OE system was a welded assembly, so replacement planning should account for the original exhaust layout and any related parts noted in the vehicle fitment.

Quality Assurance

AP Exhaust builds this converter to exact OE dimensions using automated workstations, spinner welding equipment, and high-speed production lines to support consistent fitment and production quality.

Related reading

This part fits 14 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2012ToyotaRAV42.5LL4N/ADirect Fit; (Use w/ 50020); 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.; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; U.S. BUILT
2012ToyotaRAV42.5LL4RearDirect Fit; Requires Welded Assembly 50020 to complete installation, OE is a complete welded assembly; 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.
2011ToyotaRAV42.5LL4N/ADirect Fit; (Use w/ 50020); 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.; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; U.S. BUILT
2011ToyotaRAV42.5LL4RearDirect Fit; Requires Welded Assembly 50020 to complete installation, OE is a complete welded assembly; 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.
2010ToyotaRAV42.5LL4N/ADirect Fit; (Use w/ 50020); 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.; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; U.S. BUILT
2010ToyotaRAV42.5LL4RearDirect Fit; Requires Welded Assembly 50020 to complete installation, OE is a complete welded assembly; 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.
2009ToyotaRAV42.5LL4N/ADirect Fit; (Use w/ 50020); 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.; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; U.S. BUILT
2009ToyotaRAV42.5LL4RearDirect Fit; Requires Welded Assembly 50020 to complete installation, OE is a complete welded assembly; 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.
2008ToyotaRAV42.4LL4N/ADirect Fit; (Use w/ 50020); 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.; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; U.S. BUILT
2008ToyotaRAV42.4LL4RearDirect Fit; Requires Welded Assembly 50020 to complete installation, OE is a complete welded assembly; 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.
2007ToyotaRAV42.4LL4N/ADirect Fit; (Use w/ 50020); 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.; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; U.S. BUILT
2007ToyotaRAV42.4LL4RearDirect Fit; Requires Welded Assembly 50020 to complete installation, OE is a complete welded assembly; 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.
2006ToyotaRAV42.4LL4N/ADirect Fit; (Use w/ 50020); 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.; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; U.S. BUILT
2006ToyotaRAV42.4LL4RearDirect Fit; Requires Welded Assembly 50020 to complete installation, OE is a complete welded assembly; 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.
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
17420-28710