Description: Allows for the operation of various pulleys, and drive belt accessories, with the use of a single belt Creates a secure point of contact with the pulley, which allows for traction Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type

Description: Without supercharger. 3.1 & 3.8L, 3.8L. All models. 3.8l. With tensioner pulley. 2nd Design.