Recogida: DT05 (A/R 6cm, 8cm o 10cm) 3 "Inlet T3 V-Band (2.5" o 3 ") Internal Wastegate

3 Options of Turbine Housing A/R: 6cm (.41), 8cm (.57) and 10cm (.73); please have a reference of which's a/r turbine housing best? And 2 Options of V-Band Adapters 2.5" and 3" in diameter.