[Perfectlap]

^ you got a steal...I paid $1000 for the GT3 bumper.
With the skirting I don't think you need to lower the car. It fills up the area under the doors nicely, kinda give the impression of the car being wider and lower.
Also, if you're roads are rough I would skip lowering the car. That really wears down a car and things start to come loose and the rattling gets annoying.