FOMIUZY 2.5" High-Flow Front Catalytic Converter Pair — 11" Length, O2 Sensor Port, EPA-Compliant

Built for replacement applications where a 2.5" inlet and outlet are required, this front catalytic converter from FOMIUZY delivers an 11" overall length, a welded stainless/aluminized shell, and a built-in oxygen sensor port for simple installation and accurate exhaust monitoring. It’s offered as a pair and meets EPA/OBD‑III production standards for most states (note: not currently sold in certain high-emission states). Each unit is factory-tested and backed by a lifetime warranty, making it a practical option for budget-conscious vehicle owners and installers.

How will this catalytic converter fix a P0420 or poor emission result?

Replacing a worn or missing converter often clears downstream oxygen sensor codes and restores proper catalytic function by providing the required substrate and oxygen storage capacity. The unit is engineered to match typical OEM flow characteristics so the engine computer sees more normal exhaust chemistry.

• Direct-fit shape with 2.5" inlet/outlet and 11" overall length to match many mid-pipe layouts.
• Integrated O2 sensor port allows reinstallation of the factory sensor without adapters.
• High-temperature ceramic carrier improves conversion surface area and flow.
• Factory-tested to meet or exceed OEM performance for emissions control.

What materials and construction ensure durability?

The FOMIUZY converter uses an aluminized stainless outer shell and a double-layer ceramic substrate to resist corrosion and thermal stress. Welded joints are recommended to improve sealing and long-term reliability after fitting.

• Aluminized stainless body reduces rust and extends service life.
• Double-layer ceramic carrier increases surface area while tolerating high exhaust temperatures.
• Weld-ready flanges and piping for a secure, leak-resistant installation.
• Sold in pairs—useful for replacing both front converters or keeping a spare.

Is this converter legal and where can I use it?

The product is manufactured to comply with EPA and OBD‑III production standards for most U.S. regions. However, due to stricter local regulations, it is not available for sale in certain states that require specialized certified parts.

• Meets EPA emission manufacturing standards and OBD‑III diagnostic compatibility.
• Not currently sold in California, Colorado, New York, or Maine due to local certification requirements.
• Intended for off-the-shelf replacement where 2.5" dimensions fit the vehicle exhaust layout.
• Always verify fitment and local regulations before purchase to ensure compliance.

Who is this for? This FOMIUZY front catalytic converter suits independent mechanics, DIY enthusiasts, and fleet managers who need an affordable, reliable replacement for a damaged or failed converter when the vehicle requires a 2.5" inlet and outlet with an approximately 11" unit length. It’s particularly useful when you want a ready-to-install option that accommodates the factory oxygen sensor and restores proper exhaust chemistry without the higher cost of dealer-sourced parts. Remember to confirm the part dimensions and local emissions rules before ordering, and weld the connection after test-fitting to maximize sealing and longevity.