Fit For Cummins ISX QSX Engine Include the Following Vehicle: Volvo VNL Volvo VNM Freightliner FS65 Freightliner Cascadia Freightliner Coronado Peterbilt 378 Peterbilt 367 Peterbilt 379 Peterbilt 386 Peterbilt 387 Peterbilt 388 Peterbilt 389 Peterbilt 357 Peterbilt 567 Peterbilt 579 Peterbilt 587 Kenworth T800 Kenworth T880 Kenworth T600A Kenworth T2000 Kenworth W900 Kenworth T660 Kenworth T680 Kenworth T700 Mack CL International Harvester 9200i SBA. International Harvester 9400i International Harvester SBA5600i International Harvester 5500i International Harvester 5600i International Harvester ProStar International Harvester LoneStar Western Star 4900FA Western Star 4900SA Western Star 4900EX Sterling Truck AT9500 Sterling Truck LT9500. Package Include: Belt Tensioner Assembly x1. We are always here waiting for your message. It is our pleasure to offer any help. We sincerely hope to provide our customers great products and service. If you are unsatisfied about anything, just tell us, we will solve the problem for you. We accept return in 2 months. We have professional after-sales team to solve all kinds of problem. And we promise you a satisfying solution. If you are firmly to return the products, we promise you easy return experience. Please kindly keep the packing materials until you assure the products are perfectly fit for your car and you will not return them.