Got them from Demon Tweeks I think. Sure the drop was about 45-50mm.
It's a 45mm drop for a standard golf or a GT. the GTI sits lower than the others so these will springs will only give YOUR CAR about 30mm MAX.
Mine is on H&R's and sits slightly lower than Eibachs, ride comfort is great, just slightly firmer than stock. No scraping over speed bumps even with 5 adults in.
There's plenty of threads on ride comfort with lowering springs but they all give the same answer.
Gray