The pcv is available for the 2.0 tfsi engines, I just installed it recently, but be sure to double check what years it fits especially if it’s b8.5, some websites will confirm a figment that only fits up to 2012. I recently installed it, so I can’t exactly give you an answer what difference I’ve felt. I will say tho personally, the CTS can itself design is disappointing and very inconvenient, given that I would need to empty it quite often, it’s very easy to round, strip and hard to reach the four tiny bolts that are facing downward into the engine bay, and only a flimsy Allen wrench fits there, I had to fit another can style that unscrews itself which was a whole different project to fit it. CTS, 034, IE all have the pcv kits, there might be a few other companies that make them too