Turbine Housing TypeSelectv-band turbine housing, single scroll, 0.94 a/rv-band turbine housing, single scroll, 0.85 a/rt4, 1.09 a/r, twin scroll turbine housing (supports 70mm turbine wheel)t4, 1.22 a/r, twin scroll turbine housing (supports 70mm turbine wheel)t4, 1.00 a/r, twin scroll turbine housing (supports 70mm turbine wheel)t4, 1.15 a/r, twin scroll turbine housing (supports 70mm turbine wheel)t4, 0.83 a/r, twin scroll turbine housing (supports 70mm turbine wheel)t4, 1.27 a/r, twin scroll turbine housing