The Borg Warner 177207 0.91 A/R Turbine Housing is a top quality product that is designed to fit the S300SX Turbo. This turbine housing has a 0.91 A/R vaunted and a twin flow configuration that makes it ideal for use with the T4 inlet. The 68mm turbine wheel design means that this product is able to provide superior performance while also being durable and reliable.