AP Exhaust 645255 Catalytic Converter - Right

Brand AP Exhaust 645255
Position Right
Body Material Stainless steel
Inlet Gasket Not required
Inlet Hardware None
Inlet Type A 2 bolt loose flange w/ spherical flare
Inlet Type B 2.50" id
O2 Sensor Ports 1
O2 Sensor Ports 2
Outlet Gasket Not required
Outlet Hardware Yes
Outlet Type A 2.50" od pipe
Overall Length (IN) 47
Substrate Material Ceramic
Type Federal / epa direct-fit
Fits Ford · 33 vehicles

Direct-fit replacement. Built to OE dimensions for straightforward installation.

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

Ceramic substrate. Supports efficient converter performance.

Cross-references 2L3Z5E212AA for the same application. See all 1.

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AP Exhaust 645255 Catalytic Converter

AP Exhaust 645255 is a Federal / EPA direct-fit catalytic converter built for specific Ford F-150 and Ford F-150 Heritage applications. It uses a stainless steel body, a ceramic substrate, and OE-style dimensions to support proper exhaust routing and fitment on the right side.

For buyers searching for a 2004 Ford F-150 Heritage right catalytic converter or a 1998-2003 Ford F-150 right direct-fit converter, this part number 645255 is built around the original vehicle layout and emissions configuration.

Key Features

  • Federal / EPA direct-fit catalytic converter
  • Stainless steel body for corrosion resistance
  • Ceramic substrate material
  • OE-dimensioned construction for fitment accuracy
  • Right-side application
  • One O2 sensor port listed in the product data
  • Outlet hardware included; inlet gasket and inlet hardware not required
  • Inlet design: 2-bolt loose flange with spherical flare
  • Outlet design: 2.50" OD pipe
  • Overall length: 47 inches

Product Details

AP Exhaust part number 645255 uses ARISTO substrate chemistry and modern manufacturing methods to support efficient catalyst loading while maintaining exact OE dimensions. The result is a direct-fit replacement for the right-side exhaust position on select Ford F-150 and Ford F-150 Heritage models. This converter is listed for Federal and California emissions configurations, with state-use restrictions noted in the fitment data.

This part cross-references Ford OE number 2L3Z5E212AA for the same application.

What It Helps Address

  • Failed emissions testing caused by a worn or inefficient catalytic converter
  • Check engine light concerns related to catalyst efficiency
  • Exhaust restriction from a deteriorated converter substrate
  • Rust or damage in the original right-side converter assembly
  • Fitment issues when replacing the factory converter on select Ford F-150 and Ford F-150 Heritage trucks

Fitment Notes and Installation

Fits 2004 Ford F-150 Heritage, right; Fits 1998-2003 Ford F-150, right; Fits 2000-2003 Ford F-150, right; Fits 1997-1999 Ford F-150, right; Fits 1997 Ford F-150, right. Some 2WD applications note that resizing, cutting, or bushing may be required. Review emissions restrictions before installation, since the fitment data lists limitations for CA, CO, ME, and NY.

Installation should follow the vehicle’s exhaust layout and sensor placement. Verify inlet and outlet orientation, confirm the right-side position, and compare the existing converter to the listed 47-inch overall length before final assembly. For 2004 Ford F-150 Heritage and earlier Ford F-150 applications, confirm the exact emissions package and body style before ordering.

Quality Assurance

AP Exhaust states that this converter is manufactured to OE dimensions using automated workstations, spinner welding equipment, and high-speed production lines to support consistent fitment and build quality.

This part fits 33 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelDrive TypeLitersCylindersWheel BasePositionNotes
2004FordF-150 HeritageRWD4.2LV6120.2"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.; (Old Body Style)
2004FordF-150 HeritageRWD4.2LV6138.5"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.; (Old Body Style)
2004FordF-150 HeritageRWD4.2LV6119.9"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.; (Old Body Style)
2004FordF-150 HeritageRWD4.2LV6138.8"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.; (Old Body Style)
2004FordF-150 HeritageRWD4.2LV6—RightDirect Fit; (Heritage); 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.
2003FordF-150RWD4.2LV6139.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
2003FordF-150RWD4.2LV6157.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
2003FordF-150RWD4.2LV6120.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
2003FordF-150RWD4.2LV6—RightDirect 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.
2002FordF-150RWD4.2LV6120.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
2002FordF-150RWD4.2LV6139.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
2002FordF-150RWD4.2LV6157.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
2002FordF-150RWD4.2LV6—RightDirect 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.
2001FordF-150RWD4.2LV6120.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
2001FordF-150RWD4.2LV6139.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
2001FordF-150RWD4.2LV6157.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
2001FordF-150RWD4.2LV6—RightDirect 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.
2000FordF-150RWD4.2LV6120.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
2000FordF-150RWD4.2LV6157.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
2000FordF-150RWD4.2LV6139.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
2000FordF-150RWD4.2LV6—RightDirect 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.
1999FordF-150RWD4.2LV6139.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
1999FordF-150RWD4.2LV6120.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
1999FordF-150RWD4.2LV6157.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
1999FordF-150RWD4.2LV6—RightDirect Fit; With 2 Converters; 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.
1998FordF-150RWD4.2LV6157.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
1998FordF-150RWD4.2LV6139.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
1998FordF-150RWD4.2LV6120.0"RightDirect Fit; (2WD); Direct fit converter may require resizing, cutting or bushing.; 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.
1998FordF-150RWD4.2LV6—RightDirect Fit; With 2 Converters; 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.
1997FordF-150RWD4.2LV6139.0"RightDirect Fit; [C1]; Direct fit converter may require resizing, cutting or bushing.; 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.
1997FordF-150RWD4.2LV6157.0"RightDirect Fit; [C1]; Direct fit converter may require resizing, cutting or bushing.; 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.
1997FordF-150RWD4.2LV6120.0"RightDirect Fit; [C1]; Direct fit converter may require resizing, cutting or bushing.; 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.
1997FordF-150RWD4.2LV6—RightDirect Fit; With 2 Converters; 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.
2L3Z5E212AA