HomeWalker 70401 Catalytic Converter - Right
Part #: 70401

Walker 70401 Catalytic Converter - Right

EPA, Right
⚙️ 8 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦EPA, Right
🚗Fitment: Ford and Mazda, B4000 and Ranger
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Overview of Walker EPA Catalytic Converter 70401

The Walker EPA Catalytic Converter 70401 is designed specifically for Ford B4000 and Mazda Ranger models. Engineered with a stainless steel body and ceramic substrate, this catalytic converter ensures reliable exhaust emission control tailored to your vehicle's specifications.

  • Specific fit for Ford B4000 and Mazda Ranger
  • Stainless steel body material for durability
  • Standard oval body shape with dimensions: 10" length, 6.12" width, 4.25" height
  • Dual inlet design with 2.5" inside diameter each
  • Single outlet with 2.25" outside diameter
  • Oxygen sensor locations pre-catalyst and midbed for accurate emissions monitoring
  • 2 bolt welded and loose flange inlet/outlet types for secure mounting
  • Ceramic substrate for effective catalytic conversion

Detailed Product Description

The Walker EPA 70401 catalytic converter is a specific-fit exhaust component engineered for the Ford B4000 and Mazda Ranger. It features a stainless steel body constructed in a standard oval shape, measuring 10 inches in length, 6.12 inches in width, and 4.25 inches in height. The converter includes two inlets, each with a 2.5-inch inside diameter, utilizing a combination of 2 bolt welded and loose flanges with spherical flare for precise installation. The single outlet has a 2.25-inch outside diameter with a 2 bolt welded flange. This part incorporates a ceramic substrate designed to facilitate efficient catalytic reactions, reducing harmful emissions. Oxygen sensors are positioned both pre-catalyst and midbed to ensure optimal engine management and emissions control.

Walker EPA Product Line Information

The EPA line from Walker focuses on meeting environmental standards with components designed to provide reliable emissions control. This catalytic converter aligns with the EPA product line's goal of delivering specific-fit parts that maintain vehicle performance while addressing exhaust emissions. Although this part is not CARB certified, it is engineered to meet regular grade requirements for emission control in applicable vehicles.

Common Applications and Issues Addressed

  • Replacement for damaged or clogged catalytic converters on Ford B4000 and Mazda Ranger
  • Restores proper exhaust flow and reduces harmful emissions
  • Helps resolve check engine light issues related to catalytic converter efficiency
  • Improves oxygen sensor readings by providing accurate pre-catalyst and midbed sensor locations
  • Addresses exhaust leaks caused by flange or body damage

Installation Notes and Tips

  • Designed for specific fitment; verify compatibility with Ford B4000 or Mazda Ranger before installation
  • Mounting hardware is not included; use existing or purchase separately
  • Ensure oxygen sensors are properly reinstalled at pre-catalyst and midbed locations
  • Check flange surfaces for damage and clean before mounting to prevent leaks
  • Professional installation recommended to maintain exhaust system integrity

Quality Assurance and Warranty

Walker catalytic converters are manufactured with durable stainless steel and ceramic substrates to provide consistent performance. While this part is not CARB certified, it meets regular grade standards for emissions control. Warranty details should be confirmed with the supplier or manufacturer, as they may vary based on application and region.

BrandWalker
Part Number70401
PositionEPA, Right
Mounting Hardware IncludedNo
Universal Or Specific FitSpecific
Grade TypeRegular
Inlet Inside Diameter2.5
Body Height4.25
Body Length10
Body Width6.12
Body MaterialStainless steel
Outlet Quantity1
California Air Resources Board (CARB) CertifiedNo
Overall Length47.875
Air TubeNo
Air Tube CountNo
Body ShapeStandard oval
Converter Quantity1
Inlet 1 Type2 bolt welded flange
Inlet 2 Inside Diameter2.5
Inlet 2 Type2 bolt loose flange with spherical flare
Inlet Quantity2
Inlet Type2 bolt loose flange with spherical flare
Inlet Type2 bolt welded flange
Outlet 1 Outside Diameter2.25
Outlet 1 Type2 bolt welded flange
Outlet Outside Diameter2.25
Outlet Type2 bolt welded flange
Oxygen Sensor LocationPre catalyst and midbed
Substrate MaterialCeramic

This part fits 8 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2011FordRanger4.0LV6RightFits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31534 and 31372; Ultra Direct Fit Type; EPA
2010FordRanger4.0LV6RightFits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31534 and 31372; Ultra Direct Fit Type; EPA
2009FordRanger4.0LV6RightFits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31534 and 31372; Ultra Direct Fit Type; EPA
2009MazdaB40004.0LV6RightFits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31534 and 31372; Ultra Direct Fit Type; EPA
2008FordRanger4.0LV6RightFits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31534 and 31372; Ultra Direct Fit Type; EPA
2008MazdaB40004.0LV6RightFits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31534 and 31372; Ultra Direct Fit Type; EPA
2007FordRanger4.0LV6RightFits Fed. & Calif. Emission Models; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31534 and 31372; Ultra Direct Fit Type; EPA
2007MazdaB40004.0LV6Rightwith Federal Emission System; Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details.; Exhaust Gasket is Recommended; Additional part(s) needed to complete installation - 31534 and 31372; Ultra Direct Fit Type; EPA

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

This part directly replaces or is cross-referenced with the following part numbers:

1938830610496786457939908

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.