Well there is no PCV valve, just a flame trap. To replace the hoses and flame trap should add up to $30 if you are using volvo oem parts. Really there isn't much to it, a vent out of the valve cover that goes to the flame trap ($1 item and can be cleaned with carb cleaner and is as good as new) and a couple of funky elbowed rubber fittings that lock into the intake throttle body snorkel. I'm assuming they are doing a whole lot more than that.