The Detroit Gen 6 DD13 heavy-duty engine from Detroit is EPA 2027 compliant and built for Class 8 Freightliner Cascadia and Western Star applications. It features a high-pressure fuel system up to 2,500 bar, an oil-lubricated fuel pump, and updated injectors to improve combustion efficiency and durability. Miller timing, an asymmetric intake port, and a ball-bearing turbocharger enhance airflow, response, and efficiency. A pre-SCR system and thermal control valve improve aftertreatment warm-up and reduce parked regenerations. The engine retains strong commonality with the Gen 5 platform while improving fuel efficiency, emissions performance, and overall uptime.