Walker 16683 Catalytic Converter with Integrated Exhaust Manifold - Left

Walker EPA Catalytic Converter Manifold

Walker EPA Part Number 16683 is a direct-fit catalytic converter with integrated exhaust manifold for select Toyota applications. Built with a stainless steel body and ceramic substrate, it is designed for OBDII vehicles that need EPA-compliant emissions performance and a factory-style fit.

The Walker EPA product line focuses on emissions-system replacements for import and domestic vehicles, with coverage for federal-emissions applications where CARB certification is not required. This unit is engineered for the left-side position on select Toyota 4Runner and FJ Cruiser models.

• Direct-fit catalytic converter with integrated exhaust manifold
• Stainless steel converter body for corrosion resistance
• Ceramic substrate material
• 6-bolt welded flange inlet and 3-bolt welded flange outlet
• Pre-catalyst oxygen sensor location
• EPA-compliant design for OBDII vehicles
• Fits left-side applications on select Toyota 4Runner and Toyota FJ Cruiser models

Fitment Details

Compatible With 2017-2024 Toyota 4Runner, left. Compatible With 2013-2016 Toyota 4Runner, left, with 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. Exhaust gasket is recommended; additional part 31332 is needed to complete installation. Compatible With 2013-2014 Toyota FJ Cruiser, left, with 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. Exhaust gasket is recommended; additional part 31332 is needed to complete installation.

What This Part Helps Address

• Failed catalytic converter efficiency codes
• Exhaust leaks at the manifold-to-pipe connection
• Emissions test failures on EPA Federal Emission Equipped Vehicles
• Cracked or corroded manifold converter assemblies
• Check engine lights related to pre-catalyst exhaust performance

Installation Notes

Verify flange style, sensor location, and left-side fitment before installation. An inlet gasket is included in the package contents, and an exhaust gasket is recommended for installation. Additional part 31332 is required to complete installation on listed 2013-2016 Toyota 4Runner and 2013-2014 Toyota FJ Cruiser applications. Confirm state emissions rules before purchase, since this part is not legal for sale or use in California and other CARB-compliant states.

Quality Assurance

Walker 16683 is built to meet EPA emissions requirements for approved applications and is intended for direct replacement use on listed Toyota models. Part number 16683 also cross-references 52430 and 641515 for the same application.