DIY Race Ramps

I was tired of fighting with a jack and stacking up 2x4s in order to do oil changes and check the underside of my car, so my solution? Home made wooden race ramps! They only cost me around 20 dollars to make, and they've made it way easier to get work done on my vehicles. Check out how I made them and tell me what you think! What else have you done to make your life easier as an automotive enthusiast?