thanks for your reply would the earlier piston kit 660683 be the same as STC201 piston ? .. i know its a different axle for both, should i order 2 sets or is there a difference i can quote for order .. maybe measure piston or something .. as it would be a order by post and some can be a pain for returns thank so much for your help tried to look for axle number but it looks so nice sprayed and sealed looks like i will have to scratch the paint off and look harder dam