Pair T76 T4 0.96 A/R Turbine 0.8 A/R Comp. Exhaust Inlet Flange: T4 Flange. Turbine Trim: 76.5. Turbine A/R: 0.96. Turbine housing: Ductile iron QT450-10 - temperature resistant up to 700℃. Steel turbine wheel: K418 alloy - high oxidation stability and resistance up to 900℃.