Reference Number:38382, 89325, 49374, 53032130AA, 53032130AC, 19162299, 305325, ALT04348; 38058, 305235, 35058, 45549, 53010240, 53032129AA, 53032645AA, 53032645AC, 68058372AA, 89235; 7PK2570, K071013, 5071013, 4071013, 1012K7, 7K1013 Fitment: our Belt Tensioner fits for Ram 1500 2500 3500 2003-2008 5.7L V8 (For 5.7L V8 Engine Only) Maintain tension: The core function of the belt tensioner idler pulley kit is to accurately control the tension of the belt to sufficient friction between the pulleys, thereby effectively transmitting power and ensuring the normal operation of functions of the engine Compensation for belt length changes: The engine follow the changes in the working conditions of the car such as acceleration, deceleration, idling, and sudden . The belt also change accordingly. The belt tensioner idler kit can automatically compensate for the change in belt length. Through the tensioner adjustment device, the belt tension is adjusted in real time to that the belt always maintains the appropriate tension to adapt to different working conditions Color: Black Material: Plastic+Metal Package Contents: 1x Drive Belt Tensioner Pulley Assembly Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.