Mate try and steer clear of the un-reliable factory valve, if you have some mods planned in the future (See ur also installing an exhaust) the valve will be the weak link(got mine on ebayAUS for $115,not much more than the OEM)Originally Posted by H2Hoo
You dont have to get a noisy one, look at the GFB hybrid, they fit the MkIV perfect and install in no time.
You can go 100% atmosphere, 100% vent back or 50/50...
In summer the 50/50 is a good idea- it lets you vent half of the already hot compressed air out of the inlet allowing more cool dense air to take its place, that has to be a good thing
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