WOW, I went back and watched the Fast Intentions video about Ryans car. I know why he took out his headgaskets. The Stage Seb turbo's have the same turbine wheel as my turbos. At 29psi of boost the drive pressure ratio is at least 2 to 1. I have a 55mm compressor wheel and a 76mm exhaust turbine. The Stage Seb turbos have a 58mm compressor wheel with the 76mm exhaust turbine (I called and verified, it is different since it is a G35 frame turbo). Wish they would have called me before turning it up to 30psi of boost.