I just installed the JWT-popcharger and the Z-tube on my coupe. They were very easy to install, took about an hour, but I took my time with it. The hardest part of the entire install was putting the weather stripping around the heat shield.

I can feel a slight gain, but it is nothing too drastic. I haven't reset my ECU yet, but I probably will in a couple days. The biggest difference is the sound. There is a much throatier growl when you go through WOT. You also get a nice little whistle reminiscent of forced induction. The sound is great and makes the install worth it in my opinion.

I think that this is a really good option to have besides the Injen and Stillen CAI. The Injen and Stillen will yield a slight more increase in power than the popcharger/ztube, but the Injen and Stillen also costs about $100 more than the popcharger/z-tube. Another advantage of the popcharger/z-tube is the ease of install and maintance. There is no crawling under the car and removing the wheel and wheel well to install and change the filter.

Ryan