If the DV is a diaphragm version, then I'd much rather change it to the factory piston DV. People have had troubles with aftermarket DV's such as FORGE and a lot of people revert back to stock piston type anyway.
PCV valve was prone to fail on the MK5's which is why I also took this precautionary measure.
CAm follower, better to be safe than sorry. Personally I dont trust the VW mechs with intricate things like this so I'd much rather get it looked at by, say, Derek from EA or someone.
Still looking for a catch can though....unsure as to which one most people use
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