ROLLMASTER DOUBLE ROW TIMING CHAIN KIT TO SUIT HOLDEN MONARO HT HG HQ HJ HX 253 308 4.2L 5.0L V8All Rollmaster Red Label timing chain kits are manufactured from billet steel for both the camshaft and crankshaft sprockets. The crankshaft gear is also induction hardened to increase its wear resistance and give a long and durable life. This kit includes 9 keyway crankshaft gear allowing the cam timing to be adjusted and dialled in easily. It also is a double row design to be able to handle the higher loads of performance valve springs. This premium