On my 2003 WRX I've got both inner CV boots leaking as well as one split. In searching the site I see it is about as easy to change the entire shafts than it is to replace the boots. My question is, are both of the shafts the same? Some aftermarket sites show them being the same, but it appears that the genuine Subaru part numbers are different on the left and right, as well as some aftermarket sites list different entries for left and right. I'm confused.