MagnaFlow OEM Grade Underbody Catalytic Converter - Mercedes-Benz W166/X166 2015-2019

This is MagnaFlow's OEM Grade Federal and EPA compliant direct fit converter, a spun body assembly on a ceramic substrate with 16 gauge 409 stainless steel mandrel bent tubing that bolts into the factory location without cutting or welding. The single laser fusion weld on the spun body cuts the number of potential leak paths, and the compact low mass design carries less thermal inertia so the converter reaches operating temperature quickly. It runs 44 in overall with a 3 in inlet and a 2.5 in outlet, and it interchanges with OE parts 166 490 79 00 and 166 490 85 14. Note the emissions grade: this unit meets Federal and EPA requirements and is not legal for sale or installation in California, Colorado or New York.

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