I think i may have a problem, i went over to a friend's house the other day and rubbed going into his drive way. But it wasnt the front of my car, his drive way is realy strange and i rubbed the middle of my car, and i think i may have knocked my x pipe loose or may have damaged something enuff to cause a leak. How can i tell if i have a leak? It kinda sounds like it when i rev up sitting still, but i dont want to spend the $$$ to have it checked if there is no problem wiht it. I see that as a waste of $$$. Can some one help me??

 

well get down there and look at it