Walker 52502 Catalytic Converter - Left

EPA Direct-Fit Catalytic Converter

Walker EPA 52502 is a direct-fit catalytic converter built for OBDII-era vehicles and engineered to meet EPA standards. It is a specific-fit replacement with a stainless steel body, ceramic substrate, and welded flange connections for a factory-style exhaust repair.

Compatible with Cadillac SRX, Cadillac CTS, and Cadillac STS applications on the left side, this converter is designed for 2004-2008 model-year coverage depending on the vehicle. Walker EPA 52502 is a practical choice when you need a direct replacement for emissions-related exhaust service on a Cadillac SRX or CTS.

Key Features

• Direct-fit design for specific vehicle applications
• EPA-compliant construction for OBDII vehicles
• Stainless steel body for exhaust system durability
• Ceramic substrate material
• 2-bolt welded flange inlet and outlet connections
• Pre-catalyst oxygen sensor location
• Round body shape with 18-inch overall length
• Fits left-side applications on listed Cadillac models

Product Details

Walker EPA 52502 is part of the Walker Ultra Direct-Fit Catalytic Converter line, which focuses on direct replacement coverage for import and domestic vehicles built from 1996 and newer. This converter is configured for specific fitment and uses a stainless steel housing with a ceramic substrate to match the requirements of the listed Cadillac applications. The part number 52502 is also cross-referenced in the aftermarket for the same application, including Monroe Shocks & Struts 172286.

Common Repair Applications

• Check engine light caused by catalytic converter efficiency issues
• Failed emissions inspection on EPA Federal Emission Equipped vehicles
• Restricted exhaust flow from a worn or damaged converter
• Exhaust leaks at the converter flange area
• Replacement for a deteriorated left-side converter on Cadillac SRX, CTS, or STS

Installation Notes

Fits 2004-2007 Cadillac SRX, left; Fits 2005-2007 Cadillac CTS, left; Fits 2005-2008 Cadillac STS, left. Review the emission notes before ordering: some listed applications are not legal for sale or use in California and other CARB-compliant states, while New York and Maine restrictions apply to EPA Federal Emission Equipped Vehicles only. An exhaust gasket is recommended for installation, and the vehicle should be verified by year, model, position, and emission type before replacement.

Quality Assurance

Walker designs this EPA line for compliance-focused exhaust service on specific applications. The direct-fit layout, welded flange connections, and stainless steel construction support a factory-style repair approach for the listed Cadillac fitments.