Even my wife noticed that my clothes did not smell like exhaust after driving now. Over the winter I removed my vapor tank and gas tank to POR15 them – It’s one of those “while I am at it” things, so I might as well tackle the vapor hoses. Be sure to follow this thread as well - http://www.classiczcars.com/forums/tech-pubs-howto/25857-rating-factory-240z-fuel-vent-hoses.html I replaced all hoses with nice new fuel hosing – two were Nissan replacement parts – the rest were not I