Description
Product Overview
The MagnaFlow 99104HM catalytic converter is engineered to deliver consistent emissions reduction while withstanding the harsh conditions of daily driving. Constructed from high‑grade stainless steel, the unit resists corrosion and thermal fatigue, ensuring a long service life. With a compact 14 × 7 × 5 in. footprint and a weight of 4.77 lb, it fits easily into most exhaust systems. Certified to meet or exceed EPA OBDII requirements, this converter provides the performance expected from a premium MagnaFlow product.
Usage
Designed for universal application, the 99104HM can be installed in a variety of passenger cars, light trucks, and SUVs. Whether you are replacing a failed converter or upgrading for better emissions control, this unit offers a straightforward fit in the designated exhaust location. Professional installation is recommended to ensure proper orientation and optimal O₂ sensor integration. 
Why Choose Us
MagnaFlow’s reputation for quality is built on rigorous testing and a commitment to environmental compliance. This converter features a continuous seam weld and integrated OEM‑style O₂ ports, mirroring factory specifications for seamless integration. Backed by a 5‑year/50,000‑mile limited warranty and a 25,000‑mile emissions warranty, customers receive confidence in durability and regulatory adherence. The heavy‑metal‑grade (HM) catalyst formulation adds extra catalyst material, enhancing the conversion of harmful gases.
Key Features
- Stainless‑steel construction for superior corrosion resistance
- EPA OBDII compliant, meeting federal emissions standards
- Universal fit design for flexible installation across many vehicle models
- Heavy‑metal‑grade catalyst for increased conversion efficiency
- 5‑year/50,000‑mile limited warranty for peace of mind
FAQ
Is this converter compatible with my vehicle?
The 99104HM is a universal converter designed to fit a wide range of makes and models. Verify the exhaust system dimensions and consult a professional installer to ensure proper placement.
Do I need a professional to install it?
While technically possible for experienced DIYers, professional installation is recommended to guarantee correct orientation, secure mounting, and proper O₂ sensor connection.
What does the 5‑year/50,000‑mile warranty cover?
The warranty covers defects in materials and workmanship for 5 years or 50,000 miles, whichever occurs first, including a 25,000‑mile emissions warranty.
How does the heavy‑metal‑grade catalyst improve performance?
HM grade adds extra catalyst material, which enhances the chemical reactions that convert harmful exhaust gases into less toxic substances, improving overall emissions reduction.
Can this converter be used on diesel engines?
The 99104HM is primarily designed for gasoline‑powered vehicles. For diesel applications, select a converter specifically rated for diesel exhaust characteristics.







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