Universal Catalytic Converter – 2.25" EPA - MagnaFlow 99005HM

Keep your Miata compliant and running clean with the MagnaFlow 99005HM HM Grade Universal Catalytic Converter (2.25” inlet/outlet). Designed to meet or exceed EPA Federal emissions standards for OBDII vehicles, this converter helps eliminate harmful gases while keeping your check engine light off.

Built from highly corrosion-resistant stainless steel, the MagnaFlow 99005HM features a ribbed body and welded seams to prevent expansion and distortion under extreme heat. Its ceramic honeycomb substrate is optimized for maximum surface area, ensuring efficient catalytic conversion while maintaining exhaust flow—ideal for lightweight performance cars like the Mazda Miata.

The universal design makes it adaptable to a wide variety of vehicles and custom exhaust setups. However, it does require cutting and welding during installation. With its 2.25-inch inlet/outlet, it’s perfectly suited for Miatas running factory-style or performance exhaust piping.

Key Specs:

• Inlet/Outlet Diameter: 2.25”

• Compliance: EPA Federal emissions only (not CARB legal)

• Construction: Stainless steel, round body design

• Installation: Universal – cutting/welding required

Whether you’re replacing a worn-out cat on your daily-driven Miata or fabricating a custom exhaust for a track build, the MagnaFlow 99005HM Universal Converter provides proven MagnaFlow quality, durability, and compliance.

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