I've just had coilovers fitted and am trying them out at a front ride height of 650mm (about 30mm lower than stock). No issues so far. How low can you drop the front before you start hitting issues with speedbumps?
What you have to watch also id called bump steer, explanation below: http://www.longacreracing.com/technical-articles.aspx?item=8162
My BC were all the way down on the front when i got the car, apparently it was setup by ktec. Pain in the ass to drive. Ripped the splitter off every day and knackered a driveshaft. I think im roughly 650mm to the arch now and its a million times better.
