# MagnaFlow 21-504 OEM Grade Direct Fit Catalytic Converter (2.50" ID/2.50" OD) for 2015-2021 Mercedes-Benz C300 and More ### Performance Overview The Magnaflow OEM Grade Catalytic Converters are the perfect replacement for your stock converter. They are crafted from high-quality stainless or aluminized steel for maximum durability. They are seam-welded for unbreakable bonds with no risk of vibrations. The catalytic converters are available with a lap inserted in the point where the neck meets the catalytic converter body. The neck is carefully formed to be sure that it doesn't reach the body where it can cause trouble to the exhaust flow. As an additional safety feature, the Catalytic Converter has a heavy duty heat shield to protect it against extreme heat and give additional stability. ### Key Features - Brand: MagnaFlow - Part number: 21-504 - Product type: OEM Grade Direct Fit Catalytic Converter (2.50" ID/2.50" OD) - Designed for compatible vehicle applications listed on this page ### Vehicle Fitment - 2015 Mercedes-Benz C300, Note: 4Matic, Base; 2.0L; 2.50"; 2.50" - 2016 Mercedes-Benz C300, Note: 4Matic, Base; 2.0L; 2.50"; 2.50" - 2017 Mercedes-Benz C300, Note: 4Matic, Base; 2.0L; 2.50"; 2.50" - 2018 Mercedes-Benz C300, Note: 4Matic, Base; 2.0L; 2.50"; 2.50" - 2017 Mercedes-Benz E300, Note: 4Matic, Base; 2.0L; 2.50"; 2.50" - 2018 Mercedes-Benz E300, Note: 4Matic, Base; 2.0L; 2.50"; 2.50" - 2019 Mercedes-Benz E300, Note: 4Matic, Base; 2.0L; 2.50"; 2.50" - 2016 Mercedes-Benz Glc300, Note: 4Matic, Base; 2.0L; 2.50"; 2.50" ### FAQ **Will this fit my vehicle?** Please verify your year, make, model, position, and any fitment notes using the compatibility list above before purchase. **What part number is this?** The listed part number is 21-504. **Is this product designed for direct replacement?** Yes. This product is intended to match compatible vehicle applications listed in the fitment section. **Should I confirm fitment before ordering?** Yes. Always compare your original part, position, and vehicle details with the fitment chart before ordering. ### Common Searches - OEM Grade Direct Fit Catalytic Converter (2.50" ID/2.50" OD) for Mercedes-Benz C300 - 21-504 fitment - MagnaFlow OEM Grade Direct Fit Catalytic Converter (2.50" ID/2.50" OD) - 2015 Mercedes-Benz C300 OEM Grade Direct Fit Catalytic Converter (2.50" ID/2.50" OD) ### Vehicle Fitment Table Year Make Model Position Fitment Precision Note 2015 Mercedes-Benz C300 4Matic, Base; 2.0L; 2.50"; 2.50" 2016 Mercedes-Benz C300 4Matic, Base; 2.0L; 2.50"; 2.50" 2017 Mercedes-Benz C300 4Matic, Base; 2.0L; 2.50"; 2.50" 2018 Mercedes-Benz C300 4Matic, Base; 2.0L; 2.50"; 2.50" 2017 Mercedes-Benz E300 4Matic, Base; 2.0L; 2.50"; 2.50" 2018 Mercedes-Benz E300 4Matic, Base; 2.0L; 2.50"; 2.50" 2019 Mercedes-Benz E300 4Matic, Base; 2.0L; 2.50"; 2.50" 2016 Mercedes-Benz Glc300 4Matic, Base; 2.0L; 2.50"; 2.50" 2017 Mercedes-Benz Glc300 4Matic, Base; 2.0L; 2.50"; 2.50" 2018 Mercedes-Benz Glc300 4Matic, Base; 2.0L; 2.50"; 2.50" 2019 Mercedes-Benz Glc300 4Matic, Base; 2.0L; 2.50"; 2.50" 2020 Mercedes-Benz Glc300 4Matic, Base; 2.0L; 2.50"; 2.50" 2021 Mercedes-Benz Glc300 4Matic, Base; 2.0L; 2.50"; 2.50" 2018 Mercedes-Benz Glc350E 4Matic; 2.0L; 2.50"; 2.50" 2019 Mercedes-Benz Glc350E 4Matic; 2.0L; 2.50"; 2.50" 2017 Mercedes-Benz Slc300 Base; 2.0L; 2.50"; 2.50" 2018 Mercedes-Benz Slc300 Base; 2.0L; 2.50"; 2.50" 2019 Mercedes-Benz Slc300 Base; 2.0L; 2.50"; 2.50" 2020 Mercedes-Benz Slc300 Base, Final Edition; 2.0L; 2.50"; 2.50" 2016 Mercedes-Benz Slk300 Base; 2.0L; 2.50"; 2.50" ## Details - **Price:** 1376.05 CAD - **Vendor:** MagnaFlow - **Type:** OEM Grade Direct Fit Catalytic Converter (2.50" ID/2.50" OD) - **Tags:** 2015 Mercedes-Benz C300, 2016 Mercedes-Benz C300, 2016 Mercedes-Benz Glc300, 2016 Mercedes-Benz Slk300, 2017 Mercedes-Benz C300, 2017 Mercedes-Benz E300, 2017 Mercedes-Benz Glc300, 2017 Mercedes-Benz Slc300, 2018 Mercedes-Benz C300, 2018 Mercedes-Benz E300, 2018 Mercedes-Benz Glc300, 2018 Mercedes-Benz Glc350E, 2018 Mercedes-Benz Slc300, 2019 Mercedes-Benz E300, 2019 Mercedes-Benz Glc300, 2019 Mercedes-Benz Glc350E, 2019 Mercedes-Benz Slc300, 2020 Mercedes-Benz Glc300, 2020 Mercedes-Benz Slc300, 2021 Mercedes-Benz Glc300, 21-504, Auto Parts, Automotive, Catalytic Converter, Direct Replacement, Exhaust Performance, Exhaust System, MagnaFlow, Magnaflow-21-504, Muffler, OEM Grade Direct Fit Catalytic Converter (2.50" ID/2.50" OD), Performance Exhaust, Performance Parts, Vehicle Fitment ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 1376.05 CAD | In stock | ## Images - MagnaFlow 21-504 OEM Grade Direct Fit Catalytic Converter (2.50" ID/2.50" OD) --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/magnaflow-mercedes-benz-c300-catalytic-converter-21-504) > Updated: 2026-07-16