EK 530DRZ2 X 170 Precut includes Master Link - The Pro Stock & H-D Destroyer Racers ChoiceThis special 530DRZ2 top quality chain is made to meet the demanding requirements of different types of racing. It is the choice for drag racers and motorcycle enthusiasts who demand the best. Designed in conjunction with Pierre Elliott of Diamond Powersports, the EK 530DRZ2 is chosen by more top NHRA Pro Stock Bike competitors than any other chain. The reason is simple: When a championship is on the line, you cant afford a failure. In 2004, Sam Wheeler used the 530DRZ2 in recording the fastest-ever terminal speed for a two-wheel vehicle: 338.269mph!