Collection: TD05 3" Anti-Surge or Non-Anti-Surge T3 V-Band Internal Wastegate Types

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.