Just out of curiosity, are those things capable of producing a nice gain?

I've read that you need to have all the electronics to actuate the butterfly valves. Does it fit on the 2G's relatively well? I've read that the A/C on our cars is usually an issue in fitting these in. Would we be able to keep the A/C and still use this?

I noticed the Brothers run one of these also. I'm just wondering if it's worth it to install this.

Also, how much do they usually cost?