Man I just installed my C&L street CAI with the custome sct tune from Brenspeed and wow I was amazed. I had heard some people at the track that said it wouldn't do much so I was a little scared but I went ahead and tried it. I got it all installed and the tune loaded up. When I hit the gas just sitting there the car just twisted. I knew then I had some great power. The tune makes my fan run all of the time which is ok I guess. Throttle response is just amazing, it is there when you want it even when you are out of the power band. I definately recommend this combo.