The company’s MaxxForce 11 and MaxxForce 15 engines were not included in CARB’s announcement and will continue to be sold using their existing EPA credits, said a Navistar spokesman.

“The bottom line is that Navistar will sell engines in 2012 that are fully certified in all 50 states,” said Jack Allen, president of Navistar’s Engine Group, during a Feb. 1 stock analysts’ meeting.

Navistar diesel engines use an in-cylinder exhaust gas recirculation technology to reduce exhaust emissions. Its North American heavy-duty engine competitors use selective catalytic reduction aftertreatment technology to meet the required emissions levels.