What is the A/R ratio, and why does 1.45 matter?

The A/R ratio (Area divided by Radius) on a turbine housing dictates the flow characteristics of exhaust gases. A higher A/R ratio like 1.45 generally allows for better exhaust gas flow at higher RPMs, which can lead to more top-end power. It's typically suited for engines that spend more time in the upper rev range.

What material is this turbine housing made from and why?

This housing is made from stainless steel. This material is chosen because it can handle the extreme heat and corrosive exhaust gases produced by performance engines without degrading or corroding over time, ensuring a longer service life for the component.

What else might I need to install this turbine housing?

You will likely need appropriate exhaust manifold gaskets and downpipe gaskets to ensure a proper seal. It's also important to have the correct hardware for mounting the housing to the turbocharger's center section and the downpipe.

TiAL Sport Turbine Housing BWVB99145-1.45 S400 99mm

Name: TiAL Sport BWVB99145-1.45 A/R S400 99mm Stainless Steel Turbine Housing
Brand: TiALSport
SKU: tialsport-tial-sport-bwvb99145-1-45-a-r-s400-99mm-stainless-steel-turbine-housin-t14-538375
Price: 693.31 USD
Availability: BackOrder

TiAL Sport BWVB99145-1.45 A/R S400 99mm 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 BWVB99145-1.45 A/R S400 99mm Stainless Steel Turbine Housing.

Key Features

Fits TiAL Sport S400 turbochargers with a 99mm compressor wheel.
Features a 1.45 A/R ratio for optimized exhaust flow and power delivery.
Constructed from stainless steel to withstand high exhaust temperatures and resist corrosion.
Designed for performance applications prioritizing top-end power.
Not CARB approved; cannot be shipped to California.

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Product Details

TiAL Sport is well-known for making high-performance turbocharger components, and this S400 turbine housing is a prime example of their focus on robust, reliable parts for demanding setups. This particular housing is designed for a 99mm compressor wheel and features a 1.45 A/R ratio, which helps manage exhaust gas flow to optimize turbocharger spool and top-end power. It's constructed from stainless steel, a material chosen for its ability to withstand the extreme temperatures and corrosive gases found in the exhaust stream of a performance engine.

The 1.45 A/R ratio is on the larger side, meaning it's intended for applications where sustained high-RPM power is more critical than the quickest possible spool. This makes it a solid choice for drag racing, road racing, or high-performance street applications where the engine will spend a lot of time in the upper rev range. The stainless steel construction not only resists corrosion from exhaust gases but also helps maintain structural integrity under prolonged thermal stress, which is crucial for the longevity of a performance turbo system. This housing is built to handle the rigors of serious performance tuning.

When installing this turbine housing, ensure you have the correct gaskets for both the turbine inlet (where it bolts to the turbocharger's exhaust manifold flange) and the exhaust outlet (where it connects to your downpipe). Proper sealing is critical to prevent exhaust leaks, which can rob performance and create unwanted noise. This part is not CARB approved and cannot be shipped to California.