Cummins 5.9L, Belt Tensioners, (GOOD USED) Dayco Cummins 3.9L/5.9L/8.3L Gold Label No Slack Automatic Belt Tensioner 89407 For Sale, Part # 89470 Replaces Old Part # 89407, Other Part # 3256130, 1178, 1200, 2A, C&H, Stock # 5378 | Tested & Inspected!