Parts list for BOV adaptation:
TurboXS Type-H BOV to Subaru adapter (~$30)
Radiator hose that fits above adapter (~$10)
Hose clamps for above hose (~$2.50)
1/4" or 5/16" bolts (2), nuts (2), and washers (4), 20 or 24 thread (~$2 bulk)
New Subaru BPV gasket (optional) ($??)
Gasket/sealant paste (~$3)


The SSAutochrome/XSPower FMIC kit comes with a single TurboXS Type-H style BOV port on the charge pipe right before it turns into the throttle body.  You can just buy a Type-H compatible VTA (vent to atmosphere) BOV if you want and be done with it.  I chose to adapt the stock BPV (bypass valve) so as not to cause problems.

The problem with a VTA BOV in a MAF car is that the air is metered as it goes through the MAF and is "expected" by the ECU to travel through the engine.  If it is instead dumped back out to the atmosphere when the BOV pops, the car is still adding the fuel for that air even though it doesn't go through the engine.  You get a dump of fuel and a severe rich condition on shifts.  The stock ECU doesn't like it, it can contribute to afterfire, cause drivability problems, etc.

I cut a small piece for a larger radiator hose that I picked up at Autozone.  You just need a 75 to 90 degree bend and a nice tight fit, so take your adapter piece to the store with you and fit the hoses they have and find one that has a good 90 degree bend with about 1.5" or more straight on each side of the bend.  See pictures for what I found.  

First thing to do is couple the adapter to the stock BOV.  The gasket was stuck to my stock TMIC, so I couldn't reuse it.  I instead use some gasket sealer paste.  On the bottom of the BOV there is an extra air port, so make sure not to block it with your gasket!  After applying a thin layer of paste to both parts, I put them together and bolted them up tightly. 

From there, go ahead and reattach the stock BPV dump port to the recirculate hose that goes back to the intake (pre-turbo).  Tighten that down good.  Then put the radiator hose bend in place (with hose clamps on very loosely) and pull the BPV up to get it to mate.  I also used sealant on both ends of the hose to make sure it seals.  Tighten both ends.  

This assembly is tough to seal.  Try to get things to line up with as little force as possible. You'll still need to tug.  Make sure the hoses are not slipping off and are on straight as you tighten the clamps.  The hardest one to get is the hose to the adapter (under side of BPV).  The adapter isn't really long and the alignment isn't absolutely perfect, so you may have to tug and twist on the BPV a bit as you tighten that clamp to make sure it seats well.