MagnaFlow OEM-Grade Direct-Fit Catalytic Converter - Mercedes-Benz S550 / Maybach S550 4.6L 2014-2017 (Underbody)

The MagnaFlow OEM-grade direct-fit catalytic converter (21-501) replaces the underbody converter on the 2014-2017 Mercedes-Benz S550 and 2017 Maybach S550 4.6L V8. Free-flowing mandrel-bent tubing and a spun stainless body replicate the OE design for factory-like flow and thermal efficiency, and it installs with no cutting or welding. Includes gaskets and hardware. Federal/EPA compliant - not legal for sale or use on pollution-controlled vehicles registered in California.

Specifications

This part fits:

Shipping

• In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
• Standard, expedited, and overnight options at checkout.
• Oversized items ship by freight and take longer.
• Backordered items ship as soon as stock lands — contact us for lead times.
• International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

• 30-day returns on new, uninstalled items in original packaging with all hardware.
• Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
• Installed or used parts can’t be returned — confirm fitment before you install.
• Special orders and custom items are final sale.
• Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy