Suited for highway construction and large residential/commercial site-prep projects, Model D155AXi-8 is powered by 15.24 L, 354 hp Komatsu SAA6D140E-7, Tier 4 Final emissions certified engine with Diesel Particulate Filter and SCR systems. Machine control features optimized intelligence that allows automated operation from heavy dozing to fine grading. Automatic gearshift transmission and lock up torque converter team up to select optimal gear range depending on jobsite conditions and load.