Hey guys, my A pipe and flex pipe (maybe these are the same thing) are pretty much shot....I'm losing a great deal of power and gas mileage so i decided to replace the headers and A pipe...i bought this ---> http://cgi.ebay.com/ebaymotors...33966 ..do i have anything to watch out for when I take the old one off and install the new one...some people i have talked to said it was an easy swap while others have said to take it to a shop, and ideas?...thanks for the help