I have a 2013 WRX with the Cobb access port and SF air box. Has anyone done a dyno comparison of the stage 1 93 octane tune with the stock box vs the stage 1 93 octane tune with the SF air box. It may be my imagination, but to me, the 93 octane tune with the stock air box seems to pull harder. Cobb's dyno graph only shows the stage 1 93 octane tune with the SF box. It would make it hard to sell the SF air box if in fact the car makes more power with the stock box. As an aside, I like my car's sound better with the stock box in place. I can better enjoy the rumble through my Magnaflow exhaust. Thanks for any input on this matter.