i'm curious about fitment. i have a eurojet IC and damaged the IC inlet hose. since eurojet is out of business i bought a replacement hose from CTS thinking they were all the same and it's a much tighter fit than the EJ one was. Plus it looks like the S3 TOP outlet might be slightly larger than stock the way it bubbles out? but otherwise it should fit most kits i'd assume.
I have the Wagner intercooler and the AWE S3 top on my k04 setup. fits fine. Wagner silicone hose is a bit long on the motor side of the top, but i left it alone and its been fine for years.
Just to add I'm running it on my Neuspeed FMIC.. Had to heat up the hose to get it to fit.. A real PITA.