The ball joints are different on both generations.
Another option is to unmount the arm off and take it to a shop that repairs ball joints.
Aftermarket joints aren't durable as OEM, but honda sells them only with arm.
the 4th gen and 5th gen ball joints are not the same. I have a 4g with a 5 lug swap, and I had to replace my ball joints...which are not being sold separately, so I just got new 4g A arms with ball joints and and that fixed call my clunking from all broken ball joints. I check with honda as far as the ball joints being the same and they are not.
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