Just jack that wheel up and feel around the boot and you'll most likely find it torn. Was it the EF or your Si? I'm guessing EF and the boots just dryrotted and failed. You can buy new boots but it's probably worthwhile to just get a whole new axle for that side.
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Andy - Reinstated
Hybrid Forum Moderator
'06 Subaru Legacy Spec B - Stock, for now
'98 Civic EX - CTR headlights and grill, Kosei K1's, for sale
'90 240SX - SR20DET that will never get installed, project car.