[KarlzEE Bebout]

My lift ramps are less than 4" long and I have no problem driving SLOWLY onto the lift. My car is a 289FIA replica and my exhaust is plenty low but is no problem.
As an aside, I do carry a 12" piece of 2"x8" lumber with one end beveled that I use to drive on when I need to slide a floor jack under the car. It nicely fits in my spare tire wheel well so it goes where I go and has helped me and a few of my friends over the years.