This is a Grade 5 Titanium 2 pack of bolts for K20a K24a Post mounts. These do not work with K20z3 post mount brackets that take a M14 bolt.  
Available with  Bolts and nuts to be used with or without the stock stud on some steel brackets.
These bolts/nuts will work with steel or billet post mount brackets on K Swap Mounts only. They do not work for Factory Equipped K Series chassis.