have a look on ebay mate , should be no more than £250 for both chains kits, ask how much to fit them and you get them ?? the balance chain is same on the z22se,z22yh, z20net, b207 engines ,, but the z22yh has different cam sprockets , did mine last month ,got the balance shaft kit for £99, and timing chain kit for £125,,,worth having a look,,,,,,,,