For 2021 Freightliner Cascadia 11.9L 6 Cyl X12 Cummins. For 2021 Freightliner Cascadia 14.9L 6 Cyl X15 Cummins. For 2009 - 2021 Freightliner Cascadia 12.8L 6 Cyl DD13 Detroit Diesel. For 2009 - 2021 Freightliner Cascadia 14.8L 6 Cyl DD15 Detroit Diesel.
