We ship from multiple warehouses across the country, so you get your part as soon as possible.
Free, one year (or more), unlimited mileage warranty. Covers everything; parts and shipping costs
We have reviewed over 1,000,000 fitments to guarantee an exact fit for your vehicle.
Return for any reason within 60 days for a full refund
Experts in auto parts since 1989-We are rated 4.9/5 by over 400,000 of our customers.

MagnaFlow Exhaust Products New Catalytic Converter EPA Approved
(Catalytic Converter EPA Approved - New MagnaFlow EPA Approved Direct Fit Exhaust Manifold w/ Integrated HM Grade Catalytic Converter)


Interchange Part Numbers
This is a New MagnaFlow Exhaust Products Catalytic Converter EPA Approved (Note: New MagnaFlow EPA Approved Direct Fit Exhaust Manifold w/ Integrated HM Grade Catalytic Converter). SKU number 45-43907 Z4
Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 50288. With features including free-flowing mandrel-bent tubing and highly corrosion resistant, stainless steel construction, easily install this spun body converter yourself using the proper tools, no cutting or welding required. MagnaFlow's state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE spun body design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency.
Designed to fit the 2001-2005 BMW 325i, 2001-2006 BMW 325Ci, and more, this direct-fit catalytic converter also interchanges with OE parts 18 40 7 514 503, 18 40 7 514 505, among others. The included gaskets & hardware reduce the possibility of a leaking seal while avoiding the need to reuse corroded factory parts for installation. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with Federal/EPA Emission systems.
Substrate Material - Ceramic; Converter Tube Material - Stainless Steel; Sensor Port Count - 2; Heat Shield Attached - No; Finish - Stainless Steel; Type - One-Piece; Type - Direct-Fit; Overall Length - 19.75; Inlet Mounting Hardware Included - No; Grade Type - Regular; Clamps Included - No; Converter Body Material - Stainless Steel; Inlet Gasket Included - Yes; Inlet Type - Flanged; Converter Body Length - 8; Outlet Gasket Included - Yes; Outlet Type - Flanged; Outlet Mounting Hardware Included - Yes
Specification | Description |
Part Type | Catalytic Converter EPA Approved |
SKU | 45-43907 Z4 |
Brand | MagnaFlow Exhaust Products |
Series | Manifold w/ Integrated Catalytic Converter HM Grade Federal |
Part Number | 50288 |
Type | New MagnaFlow EPA Approved Direct Fit Exhaust Manifold w/ Integrated HM Grade Catalytic Converter |
Condition | New |
Fit Type | EXACT |
Warranty | FREE 1 Year Unlimited Mileage Warranty
![]() |
Additional warranty options available.* View Options
1 Year
Unlimited Mileage Warranty
FREE
5 Year Extended Unlimited Mileage Warranty
$152.40
Lifetime Unlimited Mileage Warranty
$254.00
|
|
Weight | 12 Pounds |
Box Dimensions |
Height: 7.25" Length: 20.50" Width: 17.00" |
UPC | 841380072054 |
PRODUCT VIDEOS
2001 BMW 325Ci 2.5L - Rear
2002 BMW 325Ci 2.5L - Rear
2003 BMW 325Ci 2.5L - Rear
Click Here for Full List
- 2004 BMW 325Ci 2.5L - Rear
- 2005 BMW 325Ci 2.5L - Rear
- 2006 BMW 325Ci 2.5L - Rear
- 2001 BMW 325i 2.5L - Rear
- 2002 BMW 325i 2.5L - Rear
- 2003 BMW 325i 2.5L - Rear
- 2004 BMW 325i 2.5L - Rear
- 2005 BMW 325i 2.5L - Rear
- 2001 BMW 325xi 2.5L - Rear
- 2002 BMW 325xi 2.5L - Rear
- 2003 BMW 325xi 2.5L - Rear
- 2004 BMW 325xi 2.5L - Rear
- 2005 BMW 325xi 2.5L - Rear
- 2001 BMW 330Ci 3.0L - Rear
- 2002 BMW 330Ci 3.0L - Rear
- 2003 BMW 330Ci 3.0L - Rear
- 2004 BMW 330Ci 3.0L - Rear
- 2005 BMW 330Ci 3.0L - Rear
- 2006 BMW 330Ci 3.0L - Rear
- 2001 BMW 330i 3.0L - Rear
- 2002 BMW 330i 3.0L - Rear
- 2003 BMW 330i 3.0L - Rear
- 2004 BMW 330i 3.0L - Rear
- 2001 BMW Z3 2.5L - Rear
- 2002 BMW Z3 2.5L - Rear
- 2001 BMW Z3 3.0L - Rear
- 2002 BMW Z3 3.0L - Rear
- 2003 BMW Z4 2.5L - Rear
- 2004 BMW Z4 2.5L - Rear
- 2005 BMW Z4 2.5L - Rear
- 2003 BMW Z4 3.0L - Rear
- 2004 BMW Z4 3.0L - Rear
- 2005 BMW Z4 3.0L - Rear