The Miller CAT Advantage

We are constantly researching and integrating the latest technology into all our converters to make the most durable, reliable, and efficient converter on the market.

We focus on four main aspects of the converter: Substrates, Design, Matting, and the Body.


Substrates use the latest washcoat technology and materials as the OEM. We partner with OEM suppliers to ensure our converters have the same technology as the newest cars on the road today.


Our design minimizes welds on the converter, prevents leaks, and makes it easier to install. We design our converters to minimize points of failure to improve reliability and durability.


Matting improves insulation and thermal stability, eliminating the need for heat shields. We use advanced intumescent expanding mat products designed to function as mechanical support for the ceramic substrate and act as an exhaust gas seal while providing thermal insulation.


The body is made from high-grade stainless steel and formed by advanced CNC spin forming machines. We use materials and advanced manufacturing processes to build converters made to last.