This Heavy-duty endless cam chain is manufactured by Borg Warner in Japan and are designed and produced to exact OEM specifications. Using only special M-type chains which have special heat treated pins, plus advanced pin and link connections to ensure maximum performance and durability. This cam chain is designed for Race Use. The DME Racing Team spent the 2016 racing season testing this chain on their race bikes. After a year of quality testing, we can ensure this is THE CHAIN you need.