Size of that intercooler pipework! Is it not going to blown those jubilee clips straight off? I've had to double jubilee all my joints just to keep the pipes on!
I dont get what you are trying to say
pipework is 63mm up to the throttle body where is goes up to 70mm, into the R32 throttle body
Hi-Grip clips from Forge are used, and have seen 30psi no problem..
Maybe your clamps are cheap nasty weak things... and your pipes are poor and non-bead rolled or oiled internally making them slippy.
Nothing wrong with these when done properly