Not that old I had problems with my filters a while back they were all gelled up so I ended up going thru the whole thing from the tank forward . I don't think I have fuel filter problems but maybe I'm wrong and I only say this because before the 4k spring install I could only hit like 1000 deg on my egt with no fuel plate. now with the 4k springs I can get there in a hurry so I'm thinking I have plenty of fuel now maybe to much And possibly need a bigger turbo ?

 

The point of the GSK is to increase fueling, especially in the higher RPM's, when EGT's are usually the highest anyways, so it would seem logical you would see and increase in temps.

And there is really not an end-all solution the GSK issue. Research it, try a bunch of different things, have patience and you'll eventually get it where you want it