Holden V8 timing chain set made by Crow Cams. Suits all Holden V8 engines. Crow Cams single and double row billet steel timing chain sets are the ultimate in strength, timing accuracy and long term durability. Crow Cams timing sets feature a German IWIS brand timing chain for much greater resistance to chain stretch and breakage. • Precision CNC Machined billet steel top and bottom gears • Induction hardened crank gear for exceptional wear resistance on gear teeth • Nine keyways broached on crank gear in one pass with one tool to ensure timing accuracy 6 cylinder gear have 7 keyways • German quality IWIS true roller timing chain