personally, I look at it this way, the Nissan Parts that came on it, lasted this long, right? seeing as this is probably going to be a one time job (maybe two if you keep the X long enough) I would much rather put the parts on that have been provem to work for that many miles on that engine rather than buy someone elses stuff, not knowing the track record. The cost, yeah, maybe twice as much for Nissan parts, but again I refer back to my first comment, I would sooner pay 300 and have a piece of mind knowing the parts can last, rather than pay half that now, and wonderin if I am going to have to tear it back apart and replace parts a year or two down the road at an even higher cost. Plus the chance that you might get parts that dont fit right from the other guy, compared to being able to go as far as give a vin number to Courtesy to make sure the parts are exact if need be.........

Just my 02 cents....