If your car is lower at the rear, how would putting a lower profile tyre on the rear of the car help? You'd make the rear even lower!
Series 50 profile tyres will be far too big for a 19" wheel to maintain the rolling radius against the original specification. You could try a 45 profile on the rear, and a 40 profile on the front, but I still think the car will look odd with 19" wheels and stock suspension.
Sorry, what I meant was 50 on the rear and 45 on the front!! lol
I know what you mean. Which springs will suit the ls? I will probably lower the front a little more than the back. Will lowering my car affect the ride? I don't really want to loose the comfortable ride. Worst case I will have to sell the 19s and go for maybe the 18s off an ls430 2004 type. Like the silver one above :)