The hypereutectic Al-Si alloys with alloying elements such as Mg, Cu, Fe and Mn have been successfully produced by modern processing technologies to improve strength to weight ratio, mechanical properties and wear behavior at elevated temperature [1]. Alloying of Al with high content of Mg and Si results in the formation of Mg 2 Si phase and eutectic Al-Mg-Si phase. Offers the possibility of significant decrease in density (density of Mg 2 Si-1.99 gcm-3) and increase in stiffness compared to other Al alloys and makes them superior material for the light weight automotive applications [2]. However, the slow cooling rate of the melt associated with conventional casting methods results in a coarse microstructure of primary phase and formation of large intermetallic phases with a high degree of micro-macro segregation. Al alloy with high content of Mg 2 Si poses several difficulties by conventional casting processes due to excessive slag formation and generation of porosity caused by high solubility of hydrogen