Is it a different DIN in Subarus in the states? Certainly my last 3 Imprezas have required no special treatment to accommodate the empeg, simply slot the sled in, hook up the wires and go.
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Rory
MkIIa, blue lit buttons, memory upgrade, 1Tb in Subaru Forester STi
MkII, 240Gb in Mark Lord dock
MkII, 80Gb SSD in dock