FWIW, I had a '91 GTI. Owned the car for 17 years. As if it weren't slow enough, a gargantuan sub in the back is sure to make it (err...) better. The car's handling was its sole saving grace, and that's a gone with that much weight sitting on its ***. Lowering it to the point previously displayed drastically changes the suspension geometry for the worse, allowing its roll center to sit below ground. Essentially, the car turns into a rolling POS in terms of its dynamics.