FAW J6P 4×2 390HP tractor: lightweight 4×2 layout saves fuel vs 6×4 on highways; 10-speed, 600L long-range tank, diff-lock rear axle for wet ramps; flat-roof big sleeper with air suspension, ventilated seat, A/C; front underrun protection, anti-spray mudguards, aluminum radiator; export spec; emission configurable.