Walker 84224 Catalytic Converter - Rear

Walker CalCat Direct-Fit Catalytic Converter

Walker CalCat 84224 is a direct-fit catalytic converter built for CARB-compliant replacement on select Buick Encore and Chevrolet Trax rear applications. It is designed for a precise OE-style fit and uses a stainless steel body with a ceramic substrate for dependable exhaust flow and emissions control.

Walker CalCat is the Walker emissions line focused on direct-fit replacement converters for OBDII and non-OBD vehicles. This part number is engineered for vehicles that require a CARB-certified replacement converter and is listed for rear installation on 2013-2018 Buick Encore and 2015-2018 Chevrolet Trax applications.

Key Features

• CARB certified for use in California and other states that require CARB-compliant replacement converters
• Direct-fit, vehicle-specific design for OE-style installation
• Stainless steel body with ceramic substrate
• Round body shape with 2-bolt welded flange inlet and pipe connection outlet
• Rear-position application for select Buick Encore and Chevrolet Trax models
• Walker part number 84224 for catalog and fitment lookup

Fitment Details

• Fits 2018 Buick Encore, rear.
• Fits 2017 Buick Encore, rear. CARB Executive Order D-182-72; EFN HGMXV01.4099; must be used with 31307; exhaust gasket is recommended.
• Fits 2016 Buick Encore, rear. CARB Executive Order D-182-72; EFN GGMXV01.4099; additional part 31307 required; exhaust gasket is recommended.
• Fits 2015 Buick Encore, rear. CARB Executive Order D-182-72; EFN FGMXV01.4099; additional part 31307 required; exhaust gasket is recommended.
• Fits 2014 Buick Encore, rear. CARB Executive Order D-182-72; EFN EGMXV01.4099; additional part 31307 required; exhaust gasket is recommended.
• Fits 2013 Buick Encore, rear. CARB Executive Order D-182-72; EFN DGMXV01.4099; additional part 31307 required; exhaust gasket is recommended.
• Fits 2018 Chevrolet Trax, rear.
• Fits 2017 Chevrolet Trax, rear. CARB Executive Order D-182-72; EFN HGMXV01.4099; additional part 31307 required; exhaust gasket is recommended.
• Fits 2016 Chevrolet Trax, rear. CARB Executive Order D-182-72; EFN GGMXV01.4099; additional part 31307 required; exhaust gasket is recommended.
• Fits 2015 Chevrolet Trax, rear. CARB Executive Order D-182-72; EFN FGMXV01.4099; additional part 31307 required; exhaust gasket is recommended.

What This Converter Helps Address

• Failed emissions testing caused by a worn or inefficient rear catalytic converter
• Check engine light concerns related to catalyst efficiency on supported Buick Encore and Chevrolet Trax vehicles
• Exhaust restriction from a deteriorated converter substrate
• Replacement needs after corrosion or internal breakdown of the original converter
• CARB-compliant repair requirements for regulated states

Installation Notes

Verify the vehicle’s year, make, model, rear position, and engine family number before ordering. Some listed applications require additional part 31307, and an exhaust gasket is recommended for installation. This converter uses a 2-bolt welded flange inlet and pipe connection outlet, so exhaust alignment should be checked before final tightening.

For search reference, this part cross-references MagnaFlow Exhaust Products 551092 for the same application. Walker 84224 is a direct-fit replacement for rear catalytic converter service on select Buick Encore and Chevrolet Trax models.

Quality Assurance

Walker CalCat converters are designed, tested, and validated to meet CARB standards for regulated replacement use. The direct-fit construction is intended to provide OE-style fitment and consistent installation on the listed applications.