Engine Works 10078 Adj. Billet Double Roller Timing Set, SB Chevy 350/400

Billet Timing Set w/ Roller Thrust Bearing Does NOT fit Chevy Factory Roller Cam Blocks. Large .250 diameter double roller rolon chain; 2 piece adjustable billet steel cam sprocket; Press fit roller thrust bearing; Advance or retard the cam 2, 4 or 6; Heat treated crank sprocket with black oxide coating; ARP adjusting bolts;