Used a Cool-Tek kit. Believe it was what they call their premium one as it comes with adaptors for both filter thread sizes. Using the high quality Gates 250 PSI hose that came with the kit, I'm seeing a 1 psi drop from running with the filter in the stock location. The hoses are as short as they can possibly be.
Earlier in the summer, I made up a set of hoses using Earls top quality braided SS hose and their fittings, all AN10. With that, there was zero pressure drop, however one of the Earls fittings had a bad cone and I absolutely could not get it to seal, even when using the soft aluminum AN10 cone washers, which are designed to stop leaks. So that set up seeped oil at that fitting where the male & female cone ends come together. Went that route as I had enough of the Earls AN 10 hose left over from another project.
An issue I had with the fittings used tho was the AN to NPT adaptors screwed into the base that attached to the stock filter location took up just about too much space making the 90 degree AN fittings that screwed to those adaptors a real bear to get on (damn electric power steering unit again).
Once I get more time I may re-attempt using the braided SS hose but this time use dedicated fittings that assemble directly to the hose, are 90 degree, and with an NPT male end, at the stock filter location. I would then use same kind of fitting, but straight, which assemble directly to the hose and also have an NPT male end for the remote location. That eliminates the use of NPT to AN adaptors. Unfortunately those fittings are $29 each from Summit.