Fit For GM V8 LS/LT series 1997-2023 (LS1, LS2, LS3, LS4, LSX, LSA, LS6, LQ4, LQ9, LT1, LT4, etc.). Not Fit LT1 5.7L engines (1992-1997). Thread: M16×2.0. Type: Balancer Installer Tool. This harmonic balancer install tool is made of high grade steel with great durability, which is effective for rust, crack and deformation resistance.