LS1 Harmonic Balancer Crank Crankshaft Pulley Bolt LS LSX LS2 LS3 LQ4 LQ9 5.3L 6.0L 6.2L 551218 16mm-2.0 1/Pkg Will fit al GM LS series engines EXCEPT LS7 and LS9 Factory replacement torque-to-yield&nbsp;