Ar ive had a few zx volcanes and dturbos with bosch's, loads you can do to the bosch pump, did lots of pump tuning to my old 306 and fitted a k03 at 23psi, used to sit on vts's and r5 gt's, 2.1 engines aint needed for whats capable on the xud9, 170-180 is easily possible with a t25, but most people fit 11mm heads to the pumps but i dont see the point, your focus neeeeeeds coilovers lol