it actualy melted a little denny. did it first time it warmed up, weird stuff . it's been replaced with a better hose. we stuck the clear on to watch for oil. seems to work really well. i've done 8 cars this way so far. i personaly dont like the pcv system. i'd rather run it to the breather than have a vac leak under the butterflys. my next one will evac to the breather.