JOHNSON MATTHEY CRT

This page last reviewed September 12, 2012.

PLEASE NOTE: Verifications are issued chronologically.  The most recently issued Executive Order or individual attachment is the one which is currently in effect and is listed below each manufacturer’s verification.  The most recent Executive Order supersedes any previous Executive Orders for the same product.   Should you wish to view any previous Executive Orders or attachments for reference purposes related to a manufacturer’s verification, please click on the associated link below each description.

The Air Resources Board has verified the Johnson Matthey reformulated CRT™ Particulate Filter system for specific 1994 through 2006 model year diesel engines used in on-road applications. All of these engines are four-stroke, turbocharged, and were certified in California to the 0.1 gram per brake horsepower-hour (g/bhp-hr) particulate matter (PM) emission standard when new. The reformulated CRT™ Particulate Filter system employs a catalyst and a wall-flow diesel particulate filter with a back pressure monitor to achieve an 85 percent reduction in particulate matter emissions, qualifying it for Level 3 “Plus” verification. Specific engine families and conditions for which the reformulated CRT ™ Particulate Filter system has been approved may be found in the Executive Order and attachment below.