All spec-v's except the 06' have a major problem with the front cat breaking up and getting sucked into the engine and messing up the cmpression. Also there are butterfly valves that are used for some wannabe v-tech and the scews that hold the valves on come off and get sucked into the intake manifold. I had an 04 spec-v and it was a great car until it hit 49xxx and then the engine blew. I would advise you not to buy one. I know plenty of people who have had nothing but problems with these cars. Go to this forum, it will have everything you need to know: http://www.nissanforums.com/qr25-2-5l-engine/