You *can* run a blowoff but I wouldnt recommend it. Venting metered air can cause a momentary rich condition between shifts and sometimes even cause stalling/stuttering. If you do I would recommend an HKS style that doesnt require adjustment.
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'05 Outback XT, 19 mpg
BP-turbo 93 Festiva (long gone)
1/4 mile - 12.50@111.5
Best MPG - 36.8
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