More details are emerging in Tenneco Inc.’s plans for its Kettering facility. As the DBJ first reported, the global automotive parts manufacturer is investing $61 million and plans to hire 300 new employees at the local operation. The plant, which currently has 400 workers, will be transformed into a more prominent operation. The site will become Tenneco’s single center of excellence for shock absorber assembly in north and central U.S. by 2020. In addition, the Kettering plant will become a center of excellence for critical components including valves and rods.