The rear subframe on the Subaru WRX and STI has a reputation for moving under heavy lateral loads. So for those of you who are regular track enthusiasts, or even the occasional weekend autocross participant these would be a good idea for you.
The Kartboy rear subframe locks are two bolts installed into sleeves that will keep your subframe locked in place and you won’t risk messing up your alignment among other items the factory subframe bolts can affect if they should happen to become loose.
This is a simple install, and can be done with proper ratchets and sockets.
Definitely good idea for those that want to keep your subframe in place and not mess up the alignment