Currently, im running a 19x8.5 wheel with a +34offset on all four corners. Im not sure if thats the correct offset, but thats what i found online about my wheels. My suspension is kyb excel-g struts and tanabe df210 lowering springs with cut all four fenders cutout. Im planning on going with a 19x9.5 on all four corners, but what offset would be best? The wheels Im interested in getting are available with +22 or +40? or should i getting a staggered setup with 19x8.5 and 19x9.5. the 8.5 has offsets in +30 +35 or +40 and 9.5 is +22 or +40. I wont be getting new tires, so Ill be using my current 245/40/19s.

Current setup:

 

Is the suspension already installed?
With that drop i would run the 8.5 +30 9.5+22
Make sure the front is high disk to fit the brakes

 

yeah i forgot to add the hub bore size. its 73.1mm would that clear the ls400 big brake? because i know 60.1mm is needed.

 

honestly you sound like you have next to no idea what you're doing, i advise you reference a shop for the actual installation...

the hub size is simply the size of the centerbore on the hub where it is supposed to meet the hole drilled into he wheel for actual load bearing, you need 73mm-60.1mm hub rings to take up the gap.

you're running very meaty tires, you should be able to run 9.5 +22 all around but the front will need some fender work to clear, If it was me and I was for whatever reason confined to your selection I would go with 9.5 +40 front and +22 rear.

Brake clearance is independent of both offset and bore size, you need to find out from the manufacturer if they clear big brakes.