New GM/ACDELCO belt tensioner. This is for the A/C (Air conditioning) compressor, 4-rib belt. This includes the pulley as shown. Fits the following:
98-02 LS1 Camaro
98-02 LS1 Firebird/Trans Am
97-04 LS1/LS6 Corvette
04-06 LS1/LS2 GTO