so 4inch clearance? thats about a regular sized fist then hey? but if i lower i swear it'll look soo good, but i will have lots of problems going into and getting out of places for sure...but if its a fist clearance i will lower fo sho..thanx yall...btw where can i get those black pieces under the front bumper, to prevent scratching amd sraping the bumper??
you don't want to go lower than 4 inches. (it's not even legal to go much lower than that in many places..coke can/cigarette box size).
as far as those "black things" those would be carbon fiber air splitters. they're expensive and if all you are going to use them for is to "prevent scratches" under you lip, then do NOT do this.
air splitters add downforce (think of it as a spoiler for your bumper).
in any case..don't worry about scratching, no one looks at the underside of your car anyway. scratching is going to happen whether your super careful or not...you should worry about scratching as less as possible. having a very low car will force you to change your driving habits.