BorgWarner 178790 S400SX 87mm 1.25 A/R T4 Twin-Flow Turbine Housing

Vehicle Fitment

• Universal Fit - Compatible with BorgWarner S400SX turbochargers featuring 87mm turbine wheels

Features

• Designed for BorgWarner S400SX turbochargers
• 87mm turbine wheel size for enhanced airflow
• 1.25 A/R turbine housing for balanced spool-up and top-end power
• T4 twin-scroll flange for improved exhaust gas routing
• Cast iron construction for durability and heat resistance
• External wastegate provision for boost control
• Optimized for high-performance applications
• Ideal for drag racing, road racing, and street performance builds

Specifications

• Part Number: 178790
• Turbine Wheel Size: 87mm
• Aspect Ratio: 1.25 A/R
• Flange Type: T4 twin-scroll
• Material: Cast iron
• Wastegate: External
• Emissions: Off-road use only

Included Components

• 1x BorgWarner 178790 S400SX 87mm 1.25 A/R T4 Twin-Flow Turbine Housing
• 1x Mounting Hardware Kit
• 1x Installation Instructions

Product Description

The BorgWarner 178790 S400SX 87mm 1.25 A/R T4 Twin-Flow Turbine Housing is engineered for high-performance applications, offering a robust solution for enthusiasts seeking significant power gains. Featuring an 87mm turbine wheel and a 1.25 A/R turbine housing, this component delivers enhanced airflow, balanced spool-up, and top-end power.

Constructed from durable cast iron, the housing is designed to withstand high temperatures and provide long-lasting performance. The T4 twin-scroll flange improves exhaust gas routing, while the external wastegate provision allows for precise boost control, making it ideal for drag racing, road racing, and street performance builds.

Please note that this turbine housing is intended for off-road use only and is not CARB or EPA compliant. Ensure compatibility with your specific turbocharger model before installation.