🔥 T4 S400 1.10 A/R Divided Turbo Exhaust Housing – For 83mm Turbine Wheel (Twin Scroll, 4 5⁄8" Outlet)

Unlock serious top-end performance with the T4 S400 1.10 A/R Divided Exhaust Housing, built for BorgWarner S400 turbos equipped with an 83mm turbine wheel. Designed with a high-flow twin-scroll volute and a T4 divided inlet flange, this turbine housing delivers improved exhaust gas management, reduced drive pressure, and increased overall turbo efficiency.

Ideal for high-horsepower diesel applications and aggressive single or compound turbo setups, the 1.10 A/R ratio balances strong mid-range power with excellent top-end flow characteristics—making it a go-to choice for performance-driven builds.

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🔧 Key Features:

• Fits BorgWarner S400 turbos with 83mm turbine wheel

• 1.10 A/R for enhanced top-end power and improved drive pressure balance

• T4 divided (twin-scroll) inlet flange – supports pulse-separated exhaust flow

• 4 5⁄8" machined outlet flange – compatible with standard S400 downpipes

• Volute twin-scroll design for optimal exhaust gas velocity and turbine efficiency

• Durable cast iron construction for high-heat, high-boost environments

• Ideal for Cummins, Duramax, and Powerstroke engines in performance or race setups

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📦 What’s Included:

• 1x T4 Divided S400 Exhaust Housing (1.10 A/R, 83mm turbine fitment)

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Whether you're building a big single or a compound system, the S400 1.10 A/R exhaust housing offers the flow and responsiveness needed to handle serious horsepower.