i cant really do that because im not just scratching the tips, i'm like hitting them. If I do it enough times, the tips will actually bend.. its not just touching the tips, my whole exhaust gets banged up lol

 

I feel your pain lazeeass ( ), I have two driveways that I have access too but the slope on one of them is so steep that there is no way I could ever park there without totally destroying the tips of my exhaust. I tried wood and all other kinds of crap and none of it worked. Not to mention, people kept stealing the wood! Anyways, luckily the other driveway has a much more agreeable slope that I can use to park my car.