Peace, mercy, and blessings of God be upon you. The parts fit the LT4 - new, nothing has been removed. 1- ATI Crank Pulley with DSX 9.45 ring with ARP crank pulley bolt. 2- DMS wide idler pulley (protects from slip). 3- DSX idler belt pulley mount, which helps with slip because you can adjust the idler pulley's tension.