I went to the track last Friday and the rear end of my car really scared me that it would break. If people are breaking there half shafts with stock cobra's, I'm making a FEW more hp than stock(431) The car will see track duty maybe a couple times a month at the most. I want to go with something I feel with take the abuse and still be in one piece at the end of the night. If anyone has went with one of these setup please let me know which one would be the best for me. Money is also an object for me, still a high school student, I want to only have to do this once.