These were custom machined to take up the space between a non-STi knuckle and STi front struts. I bought these years ago to put an STi take-off suspension on my '97 Outback. I ended up selling the car and getting a newer one without ever using them, and I finally got rid of the STI takeoffs yesterday. You will still need to drill and slot the STI housings or weld and re-drill, but the spacers are the slick way to fill the gap. Here is a Scoobymods the thread about them:
https://www.scoobymods.com/showthrea...009#post117009.
$12
Doug