New 2017 srixon z star xv targeting and designed for the golfer who insists on peak performance and the possibility to achieve at the highest level the new 2017 z star xv generates optimum ball speeds and unparalleled green side spin rates the 2017 srixon z star xv is a four piece ball with egg core technology energetic gradient growth the core ensures a lesser compression and produces an enhanced softer feel this transfers power and advances launch and distance