This generated 3 psi for me. But power is not all about pressure. Its about the amount of air youre moving into the motor. So while this was generating less pressure, it was moving enough air to run side by side with a bolt-on msp. so basically, same power, less strain on the motor. it is the only size pully, couldn't ever find a bigger one. but this gives a huge kick in the pants compared to an mp3 flash, like I had before it. I took it off before I sold it and couldn't remember how I used to drive that slow.
so I bought a universal piping kit on ebay with an intercooler and as many couplers and clamps as possible. I used the pipes and managed to make it work. I can send pictures for reference if I still have them. but it worked just fine. I used part of the piping kit for the intake as well. a couple things that make it way easier though is to have a catless header (you can get for about 100 used on here) and that frees up some power as well, and maybe slim fans but I opted not to use those. then you will need an ssafc to tune for it and take full control of your engine and get the full potential of power this set up can make! I dedicated one weekend to this and got it done and running by sunday evening. just takes some perserverance and patience.