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0403scc Hybrid05 Z

The WRX control arm bushing (on the right) is slightly wider than that on earlier generation cars, so using the earlier control arm means getting a few washers to fill the gap between the small control arm bushing and the larger mounting slot in the WRX crossmember.
Hybrid How-To No. 14: Almost any Subaru chassis, GDB WRX engine

The WRX control arm bushing (on the right) is slightly wider than that on earlier generation cars, so using the earlier control arm means getting a few washers to fill the gap between the small control arm bushing and the larger mounting slot in the WRX crossmember.  View Related Article