I don't trust those plastic/foam ramps, but that's just my opinion. You can make your own out of 2x12's and you'll never have to worry about cracking or slipping. And I can even use these on my WRX with low clearance. It cost me under $40, and that's even using 1 treated 2x12 for the bottom. They are definitely heavier, but it's worth the safety to me.