BorgWarner S400 Turbine Housing T4 .90 A/R Twin Scroll — Performance Turbo Upgrade

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Optimize Your Turbo Efficiency

The BorgWarner S400 T4 .90 A/R Twin Scroll Turbine Housing is engineered to provide superior exhaust gas management for high-performance forced induction applications. By utilizing a twin-scroll design, this housing effectively separates exhaust pulses, reducing reversion and significantly improving turbine response time. Whether you are building a street machine or a dedicated track car, this housing ensures your S400 turbocharger operates at peak efficiency.

Key Features and Benefits

• Twin Scroll Design: Maximizes exhaust energy for faster spool-up and improved mid-range power.
• Precision Casting: High-quality materials ensure durability under extreme thermal stress.
• T4 Flange Compatibility: Designed for seamless integration with common high-performance exhaust manifolds.
• Optimized A/R Ratio: The .90 A/R configuration balances top-end flow with responsive boost delivery.

This housing is a critical component for enthusiasts looking to fine-tune their power band. Its robust construction resists warping and cracking, even under the intense heat generated by high-boost setups. Proper selection of your turbine housing is essential for achieving your target horsepower and torque curves. Trust the engineering excellence of BorgWarner to deliver consistent results on the dyno and the street. Find all your high-performance turbo components at GGCRACING.