This is a set of Wossner H beam connecting rods for the Gen 1 1999 - 2007  GSXR1300 hayabusa. Wossner H beam rods are made from premium chrome moly steel for the ultimate in strength and endurance, good for 600 hp plus turbo motors, and they also use ARP rod bolts exclusivley . Made in Germany, do not confuse with cheaper asian copies! Wossner rods are available for many performance motorcycle engine applications