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Description
Catalytic Converter for OEM Grade Federal / EPA Compliant Universal Catalytic Converter MagnaFlow 51175Overview: MagnaFlow OEM Grade Federal EPA Compliant Universal Catalytic Converter 51175 helps keep the check engine light off. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design (cutting and welding is required). With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter. This direct fit catalytic converter is designed to fit the 2001 2004
Overview:
MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51175 helps keep the check engine light off. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design (cutting and welding is required). With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter.
This direct-fit catalytic converter is designed to fit the 2001-2004 Toyota Tacoma, 2007-2013 BMW 328i, and additional vehicles.
Note : Not For Sale in California
Interchange:
| Brand | Interchange Part Number |
|---|
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 2003 - 2006 | Infiniti | G35 | 3.5L/V6 | |
| 2001 - 2009 | Mazda | B2300 | 2.3L/L4 | |
| 2000 - 2002 | Mercedes-Benz | CL500 | 5L/V8 | |
| 1995 - 2002 | Mercury | Grand Marquis | 4.6L/V8 | |
| 1998 - 2002 | Chevrolet | Camaro | 5.7L/V8 | |
| 2005 - 2006 | Chevrolet | Malibu | 3.5L/V6 | |
| 1995 - 2002 | Ford | Crown Victoria | 4.6L/V8 | |
| 1999 - 2001 | Ford | Explorer | 5L/V8 | |
| 2001 - 2006 | Ford | Ranger | 2.3L/L4 | |
| 2004 | Ford | Mustang | 4.6L/V8 | |
| 2006 | BMW | 330i | 3L/L6 | |
| 2007 - 2013 | BMW | 328i | 3L/L6 | |
| 2007 - 2008 | BMW | 328xi | 3L/L6 | |
| 1999 - 2001 | Mercury | Mountaineer | 5L/V8 | |
| 2001 - 2003 | Mitsubishi | Montero Sport | 3L/V6 | |
| 2003 - 2006 | Nissan | 350Z | 3.5L/V6 | |
| 1998 - 2002 | Pontiac | Firebird | 5.7L/V8 | |
| 2005 - 2006 | Pontiac | G6 | 3.5L/V6 | |
| 2000 - 2004 | Toyota | Tundra | 3.4L/V6 | |
| 2001 - 2004 | Toyota | Tacoma | 3.4L/V6 | |
| 2001 - 2004 | Toyota | Tacoma | 2.7L/L4 | |
| 2001 - 2004 | Toyota | Tacoma | 2.4L/L4 | |
| 2006 | BMW | 325i | 3L/L6 | |
| 2006 | BMW | 325xi | 3L/L6 | |
| 2006 | BMW | 330xi | 3L/L6 | |
| 2003 - 2005 | Mercedes-Benz | C230 | 1.8L/L4 | |
| 2009 - 2013 | BMW | 328i xDrive | 3L/L6 |
Specs:
| Inlet Orientation (In.) | Angled |
|---|---|
| Body Material | Stainless Steel |
| Sensor Port Count | 0 |
| Overall Length (In.) | 11.5 |
| Outlet Quantity | 1 |
| Inlet Attachment | Weld-On |
| Heat Shield Material | Aluminized Steel |
| Inlet Quantity | 1 |
| Oxygen Sensor Location | None |
| Material | Stainless Steel |
| Outlet Attachment | Weld-On |
| Outlet Orientation (In.) | Straight |
| Heat Shield Attached | Yes |
| Body Width (In.) | 5.5 |
| Series | OEM Grade |
| Subtitle | Federal / EPA Compliant |
| Body Shape | Oval |
| Body Length (In.) | 7.75 |
| Title | OEM Grade Universal |
| Type | Universal |
| Body Height (In.) | 3.75 |
| Outlet Diameter (In.) | 2.25 |
| Air Tube Adaptable | No |
| Inlet Diameter (In.) | 2.25 |
| Finish | Stainless Steel |
| Body Type | Clam Shell |
| Substrate Material | Ceramic |
| Heat Shield Included | Yes |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
THE cabin air filter to use!
Size: 9.6" x 11.1" x 2.2"
I replaced the OEM cabin air filter when I bought my truck, like I always do. 2019 & 2020 Ram 1500's suffer from an underperforming AC system in the summer due to a blend door in the dash not closing completely. Having any kind of restrictive cabin air filter only exacerbates the problem. I bought this filter on the recommendation of many owners who had done the same with great results. I was presently surprised at the increase in air flow coming out of the vents. I also like that in K7N fashion, it is washable and reusable, effectively making it a lifetime filter. Don't overthink it. Yes it costs more, but you will save $$ in the long run with this filter. I am sure this filter fits many other makes & models of vehicles and will improve the airflow of any vehicle it is installed in.
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Reviewed in the United States on July 31, 2024
★★★★★ 5
Easy to install and fits great
Size: 9.6" x 11.1" x 2.2"
Fits great and seems better quality than any paper filter. Nice rubber edge makes a good seal and the airflow is good. Used in a 2023 Ram 3500. Installation was easy. So far it appears to filter out all the dust and odors.
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Reviewed in the United States on December 16, 2025
★★★★★ 5
Best replacement filter
Size: 9.6" x 11.1" x 2.2"
Great quality replacement for factory filter, fits snug, very easy installation, and the performance is on par.
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Reviewed in the United States on February 11, 2026
★★★★★ 5
Best air flow
Size: 9.6" x 11.1" x 2.2"
I have a 2022 ram 1500 four-door. The factory filter from the ram dealer is about $40 but it’s not reusable. That was the only one I found that had good airflow into the cabin. I tried several other brands but the airflow was reduced excessively. The ram filter was 15 mph, most of the other aftermarkets dropped the airflow to about 9 mph. I just installed a K&N reusable filter and the airflow is back up to 15 mph. Great job K&N!!
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Reviewed in the United States on March 27, 2026
★★★★★ 5
Fits Well and Reusable. I'm Happy.
Size: 9.6" x 11.1" x 2.2", Size: 9.6" x 11.1" x 2.2"
For less than the price of 2 disposable FRAM CV11671 cabin filters for my 2019 RAM 1500 and this will last forever. If it gets wet, like I've had happen with the paper throw-away filters due to stuff falling off trees in the spring and clogging cowl area water drains and backing up into filter ( yeah, that's a thing ) and can clean and dry this filter and reuse. Great directions came in the box along with a sticker to point out that this is a lifetime filter so someone doesn't throw it away. Do this yourself. Don't let some auto repair shop talk you into it. I was getting tires balanced recently and heard a quote they gave over the phone of $79 to do this. I don't know what kind of vehicle that was for but this ain't rocket science. Don't get ripped off. Now back to this filter. There is no arrow for air flow so I figure it flows well both ways and just put it in with the K and N logo right side up and facing out. It's not a straight in shot the way RAM positioned the opening for the cabin filter slot but was no big deal. Also realize this isn't a perfect square filter ...It's a rectangle so don't try to shove the fat end in and say it doesn't fit. I haven't noticed any air flow differences with the heating / ac system but some people say they do. I'm just happy I don't have to buy anymore disposable filters and can dry this if it gets wet. The cleaning and refresh spray kit is #99-6000 that comes with a 8oz and 12oz bottle and I'm trying to find that cheaper somewhere for when I do clean this thing.
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Reviewed in the United States on November 20, 2025