It may not be an issue for you, but I would recommend you look into getting a softer hump connector at the tube-to-shield connection. I got tired of the vibration and resonance it was causing, especially on downshifts, so I switched back to the stock airbox. There's just not enough flex to account for the motor torquing over. Car is much smoother in normal driving. I miss the growl though. I hope to research different connectors someday.

 

i do notice a bit more vibration throughout the car, but i kind of like it.