This MagnaFlow California Grade converter is the front primary catalyst for BMW's 3.0L inline six, and it carries CARB Executive Order D-193-198, which makes it legal to install in California and other CARB states on the listed vehicles. The 19.25 in assembly runs 3 in inlet and outlet diameters into a round spun body, 5 in across and 9.625 in long, closed with a single laser fusion weld instead of a seam; the compact low-mass design also reaches light-off temperature faster. Tubing is high-strength 16 gauge 409 stainless steel with mandrel bends and 308 stainless steel MIG welds over a ceramic substrate, and two oxygen sensor ports sit pre-converter and midbed to match the factory sensor layout. Gaskets and corrosion-resistant 410 stainless steel hangers are included; clamps are not. MagnaFlow covers it with a 5 year limited construction and emissions warranty.
Specifications
| Type | California Grade CARB compliant direct-fit catalytic converter |
| Position | Front, primary catalyst |
| Inlet Diameter | 3 in |
| Outlet Diameter | 3 in |
| Overall Length | 19.25 in |
| Body | Round spun, 5 in across, 9.625 in long, single laser fusion weld |
| Substrate | Ceramic |
| Material | 16 gauge 409 stainless steel, 308 stainless MIG welds |
| Oxygen Sensor Ports | 2 (pre-converter and midbed) |
| Included | Gaskets and 410 stainless steel hangers; clamps not included |
| Emissions | CARB compliant, Executive Order D-193-198 |
| Warranty | 5 year limited construction and emissions |
| OEM Replacement | 18 30 7 594 923, 18 40 7 645 241 |
| Quantity | 1 (sold individually) |
| Part Number | 5561452 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2010-2014 | BMW | 535i GT | Base |
| 2011-2014 | BMW | 535i GT xDrive | Base |
| 2011-2014 | BMW | 535i xDrive | Base |
| 2012-2015 | BMW | 640i | Base |
| 2013-2015 | BMW | 640i Gran Coupe | Base |
| 2014-2015 | BMW | 640i xDrive | Base |
| 2014-2015 | BMW | 640i xDrive Gran Coupe | Base |
| 2013-2015 | BMW | 740i | Base |
| 2013-2015 | BMW | 740Li | Base |
| 2013-2015 | BMW | 740Li xDrive | Base |
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
