What does the 1.31 A/R ratio mean for my turbo?

The A/R (Area/Radius) ratio indicates the size of the exhaust housing's internal passage. A 1.31 A/R is a larger housing that generally allows exhaust gases to flow more freely, which can help improve top-end horsepower by reducing exhaust backpressure at higher engine speeds.

What type of turbochargers does this housing fit?

This turbine housing is specifically designed to fit S400-frame turbochargers. It is crucial to verify that your existing or planned turbocharger uses the S400 frame size for proper fitment.

What materials is this turbine housing made from?

This turbine housing is constructed from stainless steel. This material is chosen for its ability to withstand the extreme heat and pressure generated within a turbocharger system.

TiAL Sport S400 Turbine Housing 91mm 1.31 A/R 006394

Name: TiAL Sport BWVB91131-1.31 A/R S400 91mm Stainless Steel Turbine Housing
Brand: TiALSport
SKU: tialsport-tial-sport-bwvb91131-1-31-a-r-s400-91mm-stainless-steel-turbine-housin-t14-538359
Price: 693.31 USD
Availability: BackOrder

TiAL Sport BWVB91131-1.31 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 stainless steel turbine housing. 91mm wheel, 1.31 A/R.

Key Features

Fits S400-frame turbochargers.
Features a 91mm compressor wheel exducer diameter.
Includes a 1.31 A/R exhaust housing for improved top-end power.
Constructed from durable stainless steel for high-temperature resistance.
Designed for high-performance forced induction applications.
Not CARB approved; cannot ship to California.

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Product Details

If you're building a high-performance forced induction system for your vehicle, selecting the right turbine housing is critical for matching your turbocharger's airflow to your engine's needs. This TiAL Sport turbine housing is specifically designed for S400-frame turbochargers, featuring a 91mm compressor wheel exducer diameter and a 1.31 A/R ratio. This combination is well-suited for applications demanding significant airflow at higher engine speeds, helping to optimize power delivery in demanding builds.

Constructed from durable stainless steel, this housing is built to withstand the extreme temperatures and pressures found in high-performance turbo systems. The 1.31 A/R (Area/Radius) ratio dictates the exhaust gas flow path into the turbine wheel. A larger A/R like 1.31 generally promotes better top-end power by allowing exhaust gases to flow more freely, which can be beneficial for engines designed for maximum horsepower output. This housing is designed to fit S400-frame turbos, ensuring a direct fit for compatible turbocharger setups. It's important to note that this part is not CARB approved and cannot be shipped to California.

When assembling a custom turbo system, ensuring all components work in harmony is key. This turbine housing is a well-built piece from TiAL Sport, a company known for its performance turbocharger components. Proper installation and matching to your specific engine and turbocharger specifications will be crucial for achieving the desired performance results. Always refer to manufacturer guidelines for installation and compatibility details.