We do strongly urge the replacement of all the other elements that make up the camshaft and valve train assembly. The more new parts with zero wear used can only improve the end result, giving top performance and a smooth, quiet valve train.
Other components you may wish to renew at the same time:
120CA0625
120460068
120480059
120530041
131070194
920430062
491180116
920570085
920550053
921520413
120530050
120530062
491180117
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