I have a 07 STI and am installing a TXS Knocklite.
My question is, where is the factory knock sensor located at?
Is there a write up anywhere on this?

Pretty sure its the single pin connector on the front of the engine, under the intake mani, behind the power steering

I'll look for it. I wish someone had a write up or pics. I really dont know how to test it If I hook it up wrong.

The knock sensor is under the throttle body on top of the block. It is round about as big around as a 50cent peice, and 2cm tall or so. There is an 8mm bolt with a 12mm head holding it in place.

Ryan