Turbosmart Turbine Housing (66mm) T4 Divided 1.18AR

Turbosmart is well-known for making robust forced induction components, and this 66mm turbine housing for T4 divided turbochargers is no exception. It features a 1.18 A/R ratio, which is a measure of the housing's internal volume relative to its outlet diameter. A larger A/R like this 1.18 generally helps a turbocharger breathe better at higher RPMs, making it a solid choice for builds focused on top-end power. This housing is designed for T4 divided inlet flanges, meaning the exhaust gas from the engine is split into two paths before entering the turbine wheel. This design helps improve spool response and reduce exhaust backpressure compared to a non-divided housing.

Constructed from durable cast iron, this housing is built to withstand the high temperatures and pressures associated with turbocharging. The 66mm inducer diameter is a common size that works well with many turbocharger compressor wheels, offering a good balance between airflow and spool time for a variety of performance applications. When installing, ensure you use appropriate high-temperature exhaust manifold gaskets and hardware, as proper sealing is critical for turbocharger performance and longevity. This housing is intended for custom turbocharger builds or as a replacement part for specific turbocharger models that utilize this flange and A/R configuration.

Please note that this part is not CARB approved and cannot be shipped to California. Always refer to your turbocharger manufacturer's specifications to confirm compatibility with your specific turbocharger center section and compressor cover.