Rocker arm assembly501-Rocker arm assembly series-Flywheel Shell, Oil Bottom Shell, Rocker Arm Assembly, Zhejiang Jooloong Machinery Co., Ltd. Official Website - Jiulong Machinery has been engaged in the production and research and development of automotive parts for over 20 years and is a long-term strategic partner of China FAW Group, FAW Toyota, Japan Toyota, Daimler, and Yuchai Co., Ltd.