exactly where do you mount the intercooler, do u use an existing screw and hole or do u have to drill your own, and how do u do the piping back to the compressor housing. i heard u have to enlarge a hole...any help please

 

drill holes...

depends on the diameter piping you're using for the charge pipe.

 

could someone move this to the tech: forced induction section is it would get better response there, i decided after posting it ws more a technical question...