I went from -5 camber in the rear (long story) to -2 and simultaneously lowered the rear about an inch...it's about the same height still, maybe a tad lower.
We don't know your suspension setup or pictures of your current height...so can't really answer what your car's characteristics will be to lowering it more. If you have full arms/knuckles, maybe. If it's mostly stock, ehhh. Best bet is loosen everything up and play with it. Or get someone who knows these cars well to do it. I've paid $200 to get alignments with fully adjustable suspension, but that's them spending like 4+ hours and hooking me up heavily lol
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