The Air Resources Board asks that you be aware that some companies are advertising and attempting to sell devices that cannot be used to comply with the ARB diesel engine regulations.  Only diesel particulate matter (PM) filters or other devices that have been verified by the ARB to meet rigorous emission reduction and durability demonstration requirements can be used to comply.  Diesel PM filters that have been verified by the ARB are listed at http://www.arb.ca.gov/diesel/verdev/vt/cvt.htm  Be sure to check that any device you are considering is on this list.

In addition, diesel engines that operate on biodiesel or have been modified to operate in combination with diesel fuel and alternative fuels must still meet the same emission reduction requirements as other diesel engines and are not exempt from the regulations.

If you have any other questions or concerns you can contact us at (888) 315-4228.  We are here to help.