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MagnaFlow OEM Grade Direct-Fit Catalytic Converter 21-552 for the 2015-2019 Mercedes-Benz GL450 / GLE400 }
MagnaFlow 21-552 shown out of the box, photo 2 }
MagnaFlow 21-552 oem grade direct-fit catalytic converter, rear three-quarter view of the turntable spin }
MagnaFlow 21-552 oem grade direct-fit catalytic converter, rear view of the turntable spin }
MagnaFlow 21-552 oem grade direct-fit catalytic converter, opposite front three-quarter view of the turntable spin }
MagnaFlow 21-552 shown out of the box, photo 14 }
MagnaFlow 21-552 shown out of the box, photo 19 }
MagnaFlow 21-552 product photo 27 }
MagnaFlow 21-552 oem grade direct-fit catalytic converter, side view of the turntable spin }
MagnaFlow 21-552 oem grade direct-fit catalytic converter, opposite rear three-quarter view of the turntable spin }
Brand: MagnaflowSKU / Part #: MAG21-552
Regular price
$1,554.00
Regular price
$1,554.00
Sale price
$1,554.00
Check your purchasing power Apply at checkout
Subtotal: $1,554.00
MagnaFlow OEM Converter 2015-2019 Mercedes-Benz GL450 Underbody 21-552
Subtotal: $1,554.00

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Overview

Late-model engines watch catalyst efficiency closely, so a 2015-2019 Mercedes-Benz GL450 / GLE400 3.0L needs a converter loaded to factory levels. MagnaFlow's OEM Grade 21-552 is built for exactly that job and bolts in without cutting or welding. Coverage spans 5 model years: 2015-2016 Mercedes-Benz GL450 (4Matic), 2016-2017, 2019 Mercedes-Benz GLE400 (4Matic), 2016 Mercedes-Benz GLE450 AMG (4Matic) and 2017-2019 Mercedes-Benz GLS450 (4Matic), plus 1 more model in the table below. It replaces the underbody catalyst only; confirm the position on your vehicle before ordering. It ships at roughly 15 lb.

Features

  • OEM Grade loading sized for the 3.0L OBD-II catalyst monitor
  • Underbody position
  • Fits 2015-2016 Mercedes-Benz GL450: 4Matic
  • Fits 2016-2017, 2019 Mercedes-Benz GLE400: 4Matic
  • Fits 2016 Mercedes-Benz GLE450 AMG: 4Matic
  • 2 further models listed in the fitment table

What is in the box

  • Gaskets and mounting hardware for installation

Specs

Part number 21-552
Type OEM Grade Direct-Fit Catalytic Converter
Emissions Federal/EPA compliant (not for CARB states)
Grade OEM Grade
Material 16-gauge 409 stainless steel
Shipping weight 15 lb

Construction

  • OEM Grade catalyst loading for engines with sensitive OBD-II efficiency monitoring
  • Direct-fit layout: no cutting, welding or pipe stretching
  • 16-gauge 409 stainless tubing for a long service life
  • Spun body closed with a single laser-fusion weld to resist leaks
  • Mandrel-bent inlet and outlet pipes keep factory flow
  • OE-sized 410 stainless hangers
  • 308 stainless MIG welds
  • Shape developed from 3D scans of the original part

Installation

Direct-fit and bolt-on; a capable DIYer can install it with the right tools, though professional installation is recommended.

Fitment notes

Sold for federal (EPA) emissions use only; it cannot be sold or installed in California, Colorado or New York. Check the fitment table below against your vehicle, including trim and engine.

Fitment

Make Model Chassis Year Engine
Mercedes-Benz GL450 (4Matic) — 2015-2016 3.0L
Mercedes-Benz GLE400 (4Matic) — 2016-2017, 2019 3.0L
Mercedes-Benz GLE450 AMG (4Matic) — 2016 3.0L
Mercedes-Benz GLS450 (4Matic) — 2017-2019 3.0L
Mercedes-Benz ML400 — 2015 3.0L
Fitment
YearMakeModel
2015–2016Mercedes-BenzGL450
2016–2017Mercedes-BenzGLE400
2019–2019Mercedes-BenzGLE400
2016–2016Mercedes-BenzGLE450
2017–2019Mercedes-BenzGLS450
2015–2015Mercedes-BenzML400

Not sure? Text us your VIN and we’ll confirm.

Shipping & returns

Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.

Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.

Not returnable: special-order or custom items, and anything that has been installed, modified or altered.

Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.

Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.

Reviews & questions

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