I'm thinking about lowering my TL. I think it'll improve my ride quality overall. However, are there any side effects to lowering a car? What I mean by this is, will this affect others parts of the vehicle since the car was not designed to have lower springs? Please advise. thanks!

 

depends on how low you lower the car.
improper tire wear
premature wear of shocks
harsh ride on uneven surfaces
slow entrance speeds