COMP Cams Timing Set LS-X Double 9Key 3Induction hardened and precision machined Steel billet Gears for bullet proof durabilityFeature 9 keyway crank sprocket for 2 degree incremental adjustability, 8 degree maximum advance retardPre stretched, heat treated double Roller timing chain with heavy duty large pin designIncludes Torrington Roller thrust bearing for reduced frictionIdeal for all street performance and Race Applications User 1