Mine are just the standard ones, you might be able to get them to be flush, I think the coils have at least another 2" of drop in them for the front and maybe 3" in the rear if I wanted to, there was a good amount of threads left w/ the adjustment. The BC coilovers have been decent. I do think the springs they come with, esp the rears are a bit too soft, and the ride control / damping could be better (the adjustments are not super precise). It's hard to firm up the dampers without making the car too bouncy, as it feels they're not quite tuned to the springs (spring too soft for damper). They're definitely no KWs or Bilsteins, but they're alright. They do kind of feel like cheap coilovers, but they are pretty budget coilovers so not surprised there.

If you're going to go any lower than me, you'll definitely need to address the roll center, as the geometry will go all out of whack. Even now, I still need to address the lower control arm angle, I've only corrected the tie rod angle so far with the Camry/Sienna FWD front knuckles. Makes the handling feel a bit whonky as the control arms up front aren't doing as much. Car still tracks and handles great, though. It beats any lowering springs for sure