So i wasn't able to get the seat any lower even after getting the individual 4x L brackets and I realize it's because of my seat design. I have a Recaro SPG which has the rear mounting hole higher than the front one. So when I tired flipping the brackets under the rail, it put the seat at an insane gangster lean angle and I couldn't bolt the fronts down lol.
Pic for reference:
So I picked up an Planted bracket like the one below, which ditches the sliders and now my seat is about .75" lower than before. I'm happy with it for now..
If you want low low with sliders, Bride Type LF and LR appear to be the lowest. Or those Wisteria ones from Japan which require you to remove the carpet lol. Bride FGs are about the same as the Circuit Sport ones.
If you want low low no sliders, get Street Faction or custom. /thread