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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23
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Description
2016-2018 Mazda MX-5 Miata OEM Direct-Fit Catalytic Converter 21-321 MagnaflowOverview: OEM Grade Direct Fit Catalytic Converter Keep the check engine light off with MagnaFlow OEM Grade Federal EPA Compliant Direct Fit Catalytic Converter 21 321. 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
Overview:
OEM Grade Direct-Fit Catalytic Converter
Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 21-321. 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.
Note : Not For Sale in California
Interchange:
| Brand | Interchange Part Number |
|---|---|
| Mazda | PEJ5-20-55X |
| Mazda | PEJ52055X |
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 2016 - 2018 | Mazda | MX-5 Miata | 2L/L4 |
Specs:
SubtitleFederal / EPA CompliantTitleOEM Grade Direct-FitTypeDirect-Fit| Air Tube Adaptable | No |
|---|---|
| Body Height | 5 IN |
| Body Shape | Round |
| Body Type | Spun |
| Body Width | 5 IN |
| Clamp Included | Yes |
| Converter Quantity | 1 |
| Finish | Stainless Steel |
| Gasket Included | Yes |
| Hangers Included | Yes |
| Heat Shield Material | None |
| Inlet Diameter | 2.25 |
| Inlet Inside Diameter | 2.25 |
| Main Piping Diameter | 2.25 |
| Outlet Diameter | 2.25 |
| Outlet Inside Diameter | 2.25 |
| Oxygen Sensor Location | Pre Converter |
| Series | OEM Grade |
| Substrate | Ceramic |
FEATURES
- EPA OBDII COMPLIANT - This catalytic converter is designed to meet or exceed Federal EPA (Environmental Protection Agency) OBDII emissions requirements in compliance. Item is NOT shippable to CA or CO AND any order will need to be CANCELED if shipping address is located in either state
- KEEP THE CHECK ENGINE LIGHT OFF - This MagnaFlow OEM Grade catalytic converter has been engineered to satisfy the vehicle computer control monitoring requirements for the specific applications listed. Such exacting standards keep the check engine light off while guaranteeing long-term reliability
- STAINLESS-STEEL CONSTRUCTION - The utilization of highly corrosion resistant stainless-steel construction, free-flowing mandrel bent pipes and MagnaFlow’s cutting-edge CNC precision robotic manufacturing techniques ensure consistently perfect fitment, reliability, and superior longevity
- 5 YEAR / 50,000-MILE LIMITED WARRANTY - Worry-free ownership is made possible thanks to the 5 year/50,000-mile construction and 25,000-mile emissions warranty included with this MagnaFlow catalytic converter
- DIRECT-FIT - The direct-fit configuration of this catalytic converter allows it to function as a bolt-on replacement, enabling hassle-free installation with necessary hardware included. MagnaFlow utilizes state-of-the-art 3D scanning technology during the research and development process to ensure this new converter will perform exactly like the original equipment. This MagnaFlow part is vehicle specific, confirm fitment details above in "Confirmed Fit" feature
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
4.1 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 4
good chair for price
Color: Black Full Mesh, Style: Executive
I have had for about 2 months and seems to be holding up well, so far, and is comfortable for most part. Only complaint is the arms do not lower a lot, so cannot go under the desk.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
High quality and incredible customer service
Color: Black Full Mesh, Style: Executive
This is an extremely well made chair at a very competitive price. The packaging, assembly instructions, as well as the way the hardware was packaged and labeled is probably the best I've seen. I'm particular about tools, and the included allen wrench was better than the normal "included tools" so much so that i actually used it rather than one of my own. The assembly was easy, and the chair itself looks and feels very high quality, and is very comfortable. Perhaps best of all was the level of customer service. I emailed on a weekend to activate the warranty and request the free cushion they offer. I got a personal response in less than a day and they offered upgraded wheels for free as well. This is a company worth doing business with.
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Reviewed in the United States on April 5, 2026
★★★★★ 5
Excellent chair/great support.
Color: Black Full Mesh, Style: Executive
Excellent, comfortable chair! I was surprised at how easy it was to assemble---but the directions were super clear and all the pieces and parts were labeled. Once I received the chair, I was also surprised with the email follow up from Alice at Molents. All this for a reasonably priced chair.
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Reviewed in the United States on April 1, 2026
★★★★★ 5
Great Chair and Outstanding Customer Service
Color: Black Full Mesh, Style: Executive
I desperately needed a new office chair. I ordered this chair with the mesh seat and it spike up my sciatica. I reached out to the company and Alice took great care to address the issue. She sent me a new seat with a foam cushion and it resolved the issue immediately. The chair is incredibly comfortable with the lumbar support, adjustability and foot support. She also sent me upgraded wheels as my chair is on a thin chair mat on hard wood floors. Alice was extremely responsive with possible options and very thorough with instructions on how to replace the seat. It is a high quality chair that I anticipate will last me quite some time. I highly recommend this company and will definitely order products from them again should the need arise. Thank you, Alice!!
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Reviewed in the United States on June 10, 2026
★★★★★ 5
Great value and great customer experience
Color: Black Full Mesh, Style: Executive
I'm sure there are a lot of high quality chairs out there and this is one of them. For me, what sets this one apart is the customer experience from unboxing and assembly to customer care. The chair came in a surprisingly small box. To my surprise, the parts were wrapped in foam and then again in a high quality foil/foam packing material. Everything was well protected, densely packed, yet easy to unpack and locate the parts.
The assembly process was straight forward as you might expect, but the attention to detail is remarkable. For example, the screws have thread lock (a dab of the blue "goo" to keep them from coming loose). Another example is the Allen wrench they give you. It isn't a cheap L-shaped wrench. It's a T-bar with a good sized handle. The parts all have slotted screw holes to give some tolerance in lining up the screws and a little bit of adjustment room. The instructions even showed how to use the box as a bench of sorts. You can tell the designers really thought about the assembly process.
The chair came with a tag offering a free "upgraded foam seat protector cover" by sending them an email. Not only did they send one, the email response was from a human (I'm 99% positive) that asked how I liked the chair. I honestly responded that I like the arms to go down lower than this chair allows and said I might modify it. We exchanged a few messages about it and they ended up sending me some washers/spacers. It now fits my frame perfectly. Not only that, they offered to send me a different set of wheels that are more suitable for my flooring, which I took them up on. I didn't even ask!
In summary, I am extremely happy with this chair and the company I bought it from. It is a fantastic value.
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Reviewed in the United States on May 18, 2026
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