the clamp that k&n supplies is not as good of quality as the 5 clamps i send with the kit, if you overtighten the k&n clamp it will strip out so the 5th clamp i sent is for a spare. i didnt want to have ti break the seal ont he new filter to pull that clamp out, ill make a note of it in the install file.

ya ill check the horn bracket out once we swap the intakes again on the dyno later this week on a na car

Dow Corning #4 - sorry im not familiar with that stuff, you could use a little bit of saliva on the inside of the coupler if you wanted to as it will dry up after a short period of time, do not use any wd40 or the like lubricants or it will remain slippery after install.