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.
Specifications
| 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 — 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
