Metallic Herringbone Substrate

acat herringbone materials

ACAT Global Proprietary Metallic Herringbone Substrate

ACAT Metallic focuses on our proprietary metallic herringbone catalytic converter substrate technology – applying the substrate in the automotive, light/heavy-duty truck, power sports, marine and power generation (off-and on-highway) markets.

Products include our three-way catalyst (TWC) plus diesel oxidation catalyst (DOC) substrates and converters, as well as emission reduction elements (REs).

This focus on metallic herringbone converter technology is driven by the many advantages documented in our designs and materials:

  • Exhaust gasses must pass through a “turbulent maze,” thereby increasing contact with the catalyst’s surface and more efficiently controlling emissions. Particulate removal improvements as high as 44% have been documented in diesel tests compared to ceramic units.
  • Increased efficiency allows for platinum group metals (PGM) cost savings and a reduction in catalyst substrate size.
  • Lower cells per square inch (CPSI) over competitive technology improves flow by reducing back pressure for better performance and fuel economy.
  • ACAT’s proprietary bonding technology does not require a flat layer to separate corrugated layers. This further reduces back pressure as it enables cross-channel flow for improved performance and fuel economy.
  • With no straight channel path, noise vibration and harshness (NVH) is improved. This may allow downsizing of mufflers to reduce cost and weight while increasing emission control performance.
  • The metallic substrate can be formed into an endless variety of shapes, sizes and cell densities – enabling smaller and/or lighter- weight converters.
  • Heightened efficiency from smaller and lighter designs which contribute to improved NVH may allow total exhaust systems to be 4 to 8 pounds lighter in V8 applications.