BorgWarner - S400 0.90 A/R 83mm T4 Turbine Housing – 177102

BorgWarner part 177102 is an OEM-quality S400 0.90 A/R T4 turbine housing (83 mm) designed for twin-scroll turbo rebuilds in performance and heavy-duty applications.

Included

• Cast-iron twin-scroll turbine housing (0.90 A/R, T4 inlet, V-band outlet)

Key Features

• Durable OEM-style construction optimized for performance exhaust dynamics
• 0.90 A/R matched to 83 mm turbine wheel for quicker boost spooling
• T4 twin-scroll configuration with precise flow path separation
• Direct replacement with bolt-on integration into S400 systems

Fitment

Compatible with BorgWarner S400-series turbos featuring 83 mm turbine wheels—ideal for performance diesel and road-racing setups. Verify housing size and part number prior to ordering.