22 September 1998

Effective 21 September 1998, the US EPA certified ETX urban bus retrofit/rebuild equipment submitted by Engelhard Corporation. The ETX equipment is certified to a PM emission level of 0.10 g/bhp-hr for all 1988 through 1993 DDC 6V92TA DDEC II urban bus engines, including engines originally certified, or rebuilt, to meet California emissions standards.

The Engelhard's ETX kit is the first equipment certified to the 0.1 g/bhp-hr standard for the electronically controlled DDEC engines. In addition, the equipment will be offered to all parties for $7,940 or less (in 1992 dollars) incremental to the cost of a standard rebuild. Therefore, the certification triggers the 0.1 g/bhp-hr requirement for all transit operators using the UBRR compliance Option 1 that have engines in their fleet covered by this certification.

The ETX kit incorporates engine components, including cylinder head fire deck, valve faces and piston crowns, that are coated with Engelhard's proprietary GPX zirconia coating, a CMX catalytic muffler, and an improved turbocharger. The 1988 to 1990 model year engines also receive an upgraded control program for the engine electronic control module.

Contact: Anthony Erb, EPA, 202-564-9259