I personally have and installed the treadstone turbo kit on my eclipse on 9 psi and let me tell you, the car dips. The only probelm I have is that the clutch slips when it's cold. I have a stock clutch which I'm looking into chaging in the next couple of months. I did all my research using the search function and I found everything I needed using it. The only thing you need to buy seperate is the fmu, and weld the oil drain bung for the turbo. I'm also on stock internals.