BorgWarner 177208 S300SX3 T4 Twin Scroll Turbine Housing 0.91 A/R 80/74mm

Vehicle Fitment

• Universal -- fits BorgWarner AirWerks S300/S300SX3/S300SX-E turbochargers with 80/74mm turbine wheel

Fitment Notes

• Compatible with 80/74mm S300 turbine wheels -- verify wheel size before purchase
• Also fits 80/73.4mm turbine wheels per some sources
• T4 divided (twin scroll) inlet flange
• V-band outlet
• External wastegate -- no internal wastegate
• Common in 5.9L/6.7L Cummins single and compound turbo setups
• 0.88 A/R twin flow version: 177210
• 1.00 A/R twin flow version: 179905
• 0.91 A/R open flow (non-divided) version: 177207 (76mm wheel)

Features

• BorgWarner AirWerks S300SX3 series turbine housing
• 0.91 A/R -- balanced spool and top-end flow
• Twin flow (divided) volute -- improved drive-pressure balance and mid-range response
• Cast iron construction -- heat cycle durable
• External wastegate provision

Specifications

• Turbo Series: S300SX3 / S300SX-E
• A/R Ratio: 0.91
• Volute Type: Divided (Twin Flow / Twin Scroll)
• Inlet Flange: T4
• Outlet Flange: V-Band
• Turbine Wheel Compatibility: 80/74mm
• Wastegate: External
• Material: Cast Iron
• Sold Individually
• UPC: 840232708677

Included Components

• 1x Turbine housing

Product Description

The BorgWarner 177208 is a cast iron turbine housing for the AirWerks S300SX3 and S300SX-E turbocharger series with 80/74mm turbine wheels. Featuring a 0.91 A/R ratio with a divided (twin flow) volute and T4 inlet flange, this housing delivers a balanced combination of spool-up response and top-end flow capacity -- making it a popular choice for 5.9L and 6.7L Cummins single and compound turbo applications.

The twin scroll design improves exhaust pulse separation for better drive-pressure balance and mid-range punch, while the V-band outlet provides a clean, leak-free exhaust connection. External wastegate provision allows precise boost control. Sold individually as a housing only -- turbo cartridge and compressor cover sold separately.