Cost depends on if the engine has alredy had the chain oiler mod done, if you are changing both chians and age of engine as early Z22SE engines have smaller oil pumps and can suffer from low oil presure with the new type oilers. full chain kits from vauxhall would be around £250, new pumps £275. try LMF or AUTOVAUX. Chains should last 100,000 miles with good oil and changed at least every 5k. mine did 110k and still good.

As above really.. What round about price would I be looking at? It's a 2.2 astra coupe :)