Fitted with a high-quality Japanese NTN/NSK bearing for smooth operation and long life High-strength alloy or composite construction withstands engine heat and vibration Manufactured to OE dimensions for proper clearances and belt alignment Coil spring (where applicable) matches OE spring rate for proper belt tension at all engine speeds URO Parts 11287530314 Acc. Belt Tensioner Assembly, Includes Mounting Bolt, w/ NTN/NSK Bearing