COMP Cams Belt Tensioner W/Idler GM LSThe GM LS engines with the factory spring loaded belt tensioners become prone to throwing belts when used in performance Applications and with aftermarket balancers. These bolt on Billet LS Belt Tensioners are a fully adjustable solution for controlling potentially damaging resonance and maintaining desired belt tension. This Part Fits: Year Make Model Submodel 2001 2004 Avanti II Base 2010 2015 Chevrolet Camaro SS 2014 2015 Chevrolet Camaro Z 28 2013