I changed my inlet recently as the original one had perished, from age and all the blow-by oil that collected in there from the CCV/PCV.
It's easy enough to install, take off the tmic, locate the hose that runs from the PCV/CCV to the inlet and tee your send and return lines neatly to the AOS, taking care to set the send line without too many changes in elevation so as to reduce the chance of oil pooling in the lines.
You can tee the heads breather into the CCV/PCV send line, the GS AOS has a seperate inlet for this purpose.
Either way, iirc the heads breather return is capped off, as the inlet will use a single return...
I'm installing a Kap dual chamber AOS soonish, I'm just trying to nut out if I want to put the CCV loop prior to the PCV tee or or after it as described above. I guess the nut is me, generally speaking: any AOS setup is better than none
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^ Stock inlet, PCV/CCV return is the topmost pipe, basically an inverted C shape.
The heads breather is the next largest in diameter, it's the next one below the BOV return on the RHS of the inlet...
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Comparison of stock vs Perrin vs AVO inlets. Perrin keeps the stock CCV/PCV return location on top at the compressor end of the inlet, the AVO moves it to the side of the inlet, these are usually supplied with a nylon joiner and a length of heater hose to bridge the gap.
You can see the PCV valve in the pic, this being a great opportunity to remove, clean or replace it. Soaking it in UEC works well to remove the gunk.
If you really want to get picky with how your AOS is setup, take a look at this post from Nasioc.
http://forums.nasioc.com/forums/showpos ... tcount=120I'm liking this approach as it puts the seperator immediately after the CCV.