I'm not sure of the drop I didn't measure before hand unfortunately I would estimate 50-60mm, the rear coilovers are maxed out. The fronts are how I got them out the box.Windows are standard, I fitted the coilovers, the exhaust and cat was fitted at my local powerflow dealer, I've owned the car since Feb 2017, I purchased a ram Air filter fitted it, wasn't that keen on it, went back to standard. Will do.