FYI folks, as most of you would know, the SVX has the same sized airbox as the STI and WRX. I asked a few tuners over on nasioc and clubwrx about the power level you would need to reach before the stock airbox becomes a restriction - I was told 300+whp! 
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"Wise men talk because they have something to say; fools, because they have to say something." - Plato
2013 Cosmic Blue 5spd Evo X GSR
2006 Galaxy Gray 6MT RX-8 (sold)
2006 Steel Gray WRX TR (sold)
1996 Brilliant Red SVX L (sold)
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