This hardware for the attaching the rear differential and cross member parts to the car. Sometimes theses bolts get broken or the threads get destroyed or lost during differential removal or bushing installs.
The bolts, studs and nuts included install in the circled red area on the diagram. Please note the threads on the studs are different on either side; use care to ensure you are threading the correct side in.
Kit includes two bolts, two studs, and two nuts.
Fits all 2008+ Subaru WRX and WRX STI, plus all Subaru Forester. Probably a lot of other Subarus too.