There's very little upgrade options for a legacy rear sway, all you can get is a whiteline, no impreza bar will fit. Though I guess anything is better than nothing. What might be a better idea than extending the endlinks would be extending the bushing mounting brackets. That way it would clear the spare tire. Though you might have to worry about it clearing the exhaust, I don't know how much space it leaves. A different subaru sway bar fitting on an svx would be a blessing for those wanting that. You can get them at a fraction of the cost of what that custom one will be. Even a whiteline adjustable 20-24 is like 150 max. You could also get a used turbo/air sus bar for 20-50 depending on the person/junkyard. That's quite a chunk less than 650 .