I'm sure the smic and bov will be fine at 8 psi. They are both probably capable of supporting 12, but why? If you stick to 8, you should be fine. I used a fmic from an Evo 9 that I picked up for $100. Works great and looks awsome. I'm not sure on the turbo specs, but I know someone whose using the skyline turbo on his civic, with stock internals, so my guess would be around 7 psi.