M113K Billet 3 Piece Idler Pulley Kit designed to replace the high-failure rate OEM pulleys. The factory-installed double pulley set, especially the accessory belt pulley, is made of plastic and is prone to failure, often causing belt damage and debris throughout the engine compartment. 
 
Our pulleys are crafted from durable CNC billet aluminum and equipped with high-speed ZZ bearings, offering both reliability and performance. This set is an excellent preventative maintenance upgrade or an essential modification if you’re upgrading your supercharger or crank pulley.