This BorgWarner S256SX Turbo has an A/R of 1.22, T4 bolt pattern / T3 volute size inlet connection, twin scroll housing, 55.8mm compressor inducer, and a 70mm OD turbine wheel. This is a complete turbo kit, ready to bolt on to any application with a horsepower range of 220-580 HP. Have any questions? Give one of our specialists a call. Check out our turbo header build kits for your complete turbo system, complete with true American made materials. With over 250 header flange designs on hand, we can meet your needs on any application.