This MagnaFlow direct-fit catalytic converter replaces the rear underbody converter on 3.6L GM crossovers, restoring emissions compliance and clearing the check engine light without cutting or welding. It is built from 16-gauge 409 stainless steel tubing with mandrel-bent geometry that preserves factory exhaust flow, 410 stainless steel barbed hangers that damp noise and vibration, and durable 308 stainless MIG welds. MagnaFlow validates fitment with 3D metrology scanning so the converter seats like the original equipment, and the box includes the flange gaskets, bolts, and nuts needed to install. This is an OEM Grade Federal/EPA unit, not legal for sale or installation in California, Colorado, or New York.
| Type | OEM Grade direct-fit catalytic converter (Federal/EPA) |
| Position | Rear underbody (secondary) |
| Material | 16-gauge 409 stainless steel body; 410 stainless steel hangers |
| Emissions | Federal/EPA compliant — not legal in California, Colorado, or New York |
| Included Hardware | 2 flange gaskets, 2 bolts, 2 nuts |
| OEM Replacement | 84131555, 23386841 |
| Part Number | 280176 |
| Quantity | 1 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2019 | Cadillac | XT5 | Base |
| 2017-2019 | Cadillac | XT5 | Luxury |
| 2017-2019 | Cadillac | XT5 | Platinum |
| 2017-2023 | Cadillac | XT5 | Premium Luxury |
| 2020-2023 | Cadillac | XT5 | Sport |
| 2020-2023 | Cadillac | XT6 | Premium Luxury |
| 2020-2023 | Cadillac | XT6 | Sport |
| 2019 | Chevrolet | Blazer | Base |
| 2020-2023 | Chevrolet | Blazer | LT |
| 2019-2023 | Chevrolet | Blazer | Premier |
| 2019-2023 | Chevrolet | Blazer | RS |
| 2020-2023 | GMC | Acadia | AT4 |
| 2017-2023 | GMC | Acadia | Denali |
| 2017-2021,2023 | GMC | Acadia | SLE |
| 2017-2023 | GMC | Acadia | SLT |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
