where does it go, and how do i install it

 

goes in the back of the ECU.
4 allen screws (maybe torx) hold the cover on.

Take the cover off, pull the white LT1 knock module out, and press in the new LT4 module. Be sure to press firmly, but not so hard as to break anything. Replace the cover and enjoy not getting spark knock, or exhaust tube detonation knock.

 

Two things

First off, it's two torx bolts.

Second, the LT4 module doesn't make you not get spark or exhaust knock.

 

um, it makes the computer not retard timing for the normal valvetrain noise, lessens the retard caused by spark knock, and on mine eliminated all timing retard from detonations in the headers/exhaust.