Originally introduced into mining applications 25 years ago, CatTrap® was the first passively regenerating diesel particulate filter listed by MSHA, which does not increase nitrogen dioxide (NO2 ) emissions. CatTrap features an advanced base metal catalyst that automatically oxidizes accumulated particulates by over 95% and is suitable for mining, stationary, and other off-road applications. This field-proven and Verified technology provides unparalleled performance and durability in the harshest conditions.