MagnaFlow OEM-Grade Direct-Fit Catalytic Converter - Mercedes-Benz GLK350 2010-2012 3.5L - Underbody

MagnaFlow OEM-Grade direct-fit catalytic converter (21-439) for the 2010-2012 Mercedes-Benz GLK350 3.5L, underbody position. Spun-body mandrel-bent 409 stainless tubing with a single laser-fusion weld replicates the OE design for smooth flow and a leak-resistant seal; installs with no cutting or welding, and includes hardware. Interchanges with OE parts 204 490 34 20 80 and 204 490 34 20. Federal/EPA compliant; not for sale or use in California. For OBDII applications.

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