What is the A/R ratio and why does it matter?

The A/R ratio (Area/Radius) of a turbine housing describes its size and shape. A higher A/R like 1.17 generally means a larger housing, which can improve top-end power and flow at higher RPMs by allowing exhaust gases to exit more freely. It influences how quickly the turbo spools and its overall efficiency range.

What material is this turbine housing made from?

This turbine housing is made from stainless steel. This material is chosen for its ability to withstand the high temperatures and corrosive nature of exhaust gases, providing a long service life.

Can this turbine housing be used on any turbocharger?

No, this turbine housing is specifically designed for S400 frame turbochargers. You must ensure your turbocharger's turbine wheel matches the 91mm size and that the housing's mounting flange is compatible with your specific turbocharger model.

TiAL Sport S400 Turbine Housing 91mm A/R 1.17 006391

Name: TiAL Sport BWVB91117-1.17 A/R S400 91mm Stainless Steel Turbine Housing
Brand: TiALSport
SKU: tialsport-tial-sport-bwvb91117-1-17-a-r-s400-91mm-stainless-steel-turbine-housin-t14-538356
Price: 693.31 USD
Availability: BackOrder

TiAL Sport BWVB91117-1.17 A/R S400 91mm Stainless Steel Turbine Housing

$693.31

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

TiAL Sport S400 turbine housing, 91mm A/R 1.17, part# 006391. Stainless steel construction.

Key Features

Fits S400 frame turbochargers.
91mm turbine wheel size.
1.17 A/R ratio for optimized airflow.
Constructed from durable stainless steel for heat and corrosion resistance.
Designed for high-performance forced induction applications.

This turbine housing is designed for S400 frame turbochargers. Please verify compatibility with your specific turbocharger model and build requirements.

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Product Details

This is the TiAL Sport BWVB91117-1.17 A/R S400 91mm Stainless Steel Turbine Housing. It's a key component for anyone building or upgrading a forced induction system, specifically designed to house the turbine wheel of an S400-based turbocharger. The turbine housing is critical because it directs the hot exhaust gases from your engine into the turbocharger's turbine, making it spin and ultimately forcing more air into your engine. Getting this part right is essential for achieving your desired power and performance goals.

Crafted from high-grade stainless steel, this housing is built to withstand the extreme temperatures and pressures generated by exhaust gases. Stainless steel offers excellent resistance to corrosion and thermal fatigue, ensuring durability and longevity even under demanding conditions. The 91mm turbine wheel size and 1.17 A/R (Area/Radius) ratio are specific parameters that influence the turbocharger's spool characteristics and top-end power potential. A 1.17 A/R generally favors higher RPM power and can help a larger turbine wheel breathe more freely at higher engine loads, making it suitable for applications looking to maximize airflow and horsepower.

This turbine housing is designed for use with S400 frame turbochargers and is a popular choice for high-performance builds. It's important to note that this part is not CARB approved and cannot be shipped to California. Ensure this specific housing's A/R ratio and wheel size align with your engine's displacement, camshaft profile, and overall performance objectives to achieve the best possible results from your turbo system.