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CARB Extends Verification for Johnson Matthey's CRT® Particulate Filter to Include 13

The California Air Resources Board (CARB) has extended its verification of the Johnson MattheyCRT(®) Particulate Filter system to include 13″ diameter systems that will work on large bore, high horsepower 1994 to 2006 model year on-road engines up to 650 hp.

As the global pioneer and leader in controlling emissions from mobile and stationary sources, Johnson Matthey’s CRT(®) filter has revolutionized modern diesel emissions reduction. The first filter verified by EPA and CARB, the CRT filter has become the industry standard for Heavy Duty Diesel Retrofit Technology.

Marty Lassen, JM Director of Regulatory Affairs and Marketing, said the newly verified CRT filter size now allows application on large bore engines that are used in Class 7 and 8 trucks affected by CARB’s Truck and Bus regulation.

“The essence of our 13″ CRT filter design is that it is both cost effective and compact so it will fit on vehicles where competitor systems cannot due to their larger sizes,” explained Lassen. “The CRT filter is also the most trusted filter globally; it has been used for more than 200,000 retrofits.”

He added that it is also the CRT Filter is fully passively regenerating system, meaning that it requires no operator intervention to clean soot from the filter, and does not raise the temperature of the diesel exhaust.

“Also, with this verification extension,” said Lassen, “CARB has approved the JM policies for swapping (filter cleaning flexibility) and re-designation (moving the CRT system from one vehicle to another). These approvals give users a lot of flexibility in their daily operation and maintenance of vehicles equipped with CRT filters.”

For more information on the specific details of the ARB verified CRT filter including approved engine family names and model years please go to

About Johnson Matthey
Traded on the London Stock Exchange (symbol: JMAT), Johnson Matthey is a specialty chemicals company focused on its core skills in catalysts, precious metals, fine chemicals and process technologies. The $19 billion company employs around 10,000 people in over 30 countries.

About Johnson Matthey’s Emission Control Technologies (ECT):
As part of Johnson Matthey’s Environmental Technologies Division, the world’s largest supplier of catalysts for the automotive industry, Emission Control Technologies (ECT) has been providing cost-effective catalytic solutions for the worldwide light- and heavy-duty diesel markets for more than 40 years.

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Sat. July 20th, 2024

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