MagnaFlow CARB-Grade California-compliant direct-fit catalytic converter (4481683) for the 1996-1998 BMW 740iL 4.4L and 1997-1998 BMW 540i. Spun-body mandrel-bent 16-gauge 409 stainless tubing with a single laser-fusion weld replicates the OE design for smooth flow and a leak-resistant seal; installs with no cutting or welding and includes gaskets. CARB compliant — legal in California and CARB states.
Specifications
| Type | Direct-fit catalytic converter |
| Grade | California Grade (CARB compliant) |
| Material | 16-gauge 409 stainless steel (spun body) |
| Hardware | Gaskets included |
| OEM Replacement | 18 30 7 505 322, 18 30 1 437 354 |
| Emissions | CARB compliant (CA legal) |
| Part Number | 4481683 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1997-1998 | BMW | 540i | Base |
| 1996-1998 | BMW | 740iL | 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
