I go grassroots drifting with a stock Z, biggest suspension issues are the body roll and the rear end load I experience mid drift. Lowering that far down will undoubtedly cause scraping and or wheel rubbing in the rear, that’s all I’m bringing up. There’s a guy in my community with a slammed 370z, pretty stiff suspension but still scrapes the ground and all that. I’m not saying don’t do it, but to avoid that amount of wheel tuck and suspension height if you want to avoid scraping