New Komatsu Vantage-series graders offer class-leading visibility, more power and non-stall transmission. Komatsu Australia has released its new Dash 5 Vantage series of graders – consisting of two models, the GD555A-5 and the GD655A-5 – featuring the best cab visibility of any grader on the market, increased engine power, and an upgraded version of its unique dual-mode transmission system.