At 20psi. I don’t have my graph on hand(maybe someone has it and can post it?). I have all the breather mods available..piping, exhausts, and cams.. but above 5-5500rpm the turbos start to fall behind. I think near redline it’s only making 500whp ish, so yes you can outflow the small turbos with all supporting mods. My car is still a blast to drive though, but it’s begging for some gtx2860s.