What is the benefit of a divided turbine housing?

A divided turbine housing separates exhaust pulses from each cylinder. This helps prevent interference between pulses, leading to more efficient exhaust flow into the turbine wheel and a quicker spool-up time for the turbocharger.

What does the 1.15 A/R ratio mean for performance?

The A/R ratio (Area/Radius) indicates the size of the turbine housing's internal passage relative to the turbine wheel. A 1.15 A/R is generally considered a larger housing size, which favors higher-end power output and top-end flow, while still offering reasonable spool characteristics for its size.

What turbochargers is this housing compatible with?

This housing is designed for turbochargers that use a T4 turbine inlet flange and are intended to be paired with a 70mm turbine wheel. Always verify your turbocharger's specifications to ensure it matches the T4 flange and wheel size.

Turbosmart T4 Divided Turbine Housing 1.15AR 70mm TS-19TH70C

Name: Turbosmart T4 Divided 1.15AR 70mm Turbine Housing
Brand: Turbosmart
SKU: turbosmart-turbosmart-t4-divided-1-15ar-70mm-turbine-housing-t14-1006722
Price: 551.69 USD
Availability: BackOrder

Turbosmart T4 Divided 1.15AR 70mm Turbine Housing

$551.69

On Backorder — Expected to ship by May 9, 2026

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

Turbosmart T4 Divided 1.15AR 70mm Turbine Housing

Key Features

Turbosmart T4 Divided 1.15AR 70mm Turbine Housing
Cast iron construction for durability under high heat and pressure.
Divided housing design improves exhaust pulse separation for better efficiency.
1.15 A/R ratio balances quick spool-up with high-end power.
Features a 70mm turbine wheel housing.
Utilizes a T4 inlet flange for broad compatibility with aftermarket turbos.

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Product Details

This is the Turbosmart T4 Divided 1.15AR 70mm turbine housing, designed for high-performance turbocharger setups. It's a crucial component for managing exhaust gas flow into the turbine wheel, directly impacting spool speed and overall power delivery. The divided housing design helps separate exhaust pulses from each cylinder, leading to improved efficiency and reduced turbo lag compared to undivided housings.

Crafted from durable cast iron, this housing is built to withstand the extreme temperatures and pressures found in boosted engine applications. The 70mm turbine wheel housing and 1.15 A/R ratio are specifically chosen to balance quick spool-up with high-end power potential, making it a popular choice for builds aiming for significant horsepower gains. The T4 flange ensures compatibility with a wide range of aftermarket turbochargers that utilize this common inlet flange standard.

When installing this turbine housing, ensure you have the correct gaskets and hardware for a leak-free seal. Proper exhaust manifold and wastegate integration are key to maximizing the benefits of this component. Remember, this part is not CARB approved and cannot be shipped to California.