Garrett GT47 Turbine Housing Kit O/V 1.23 A/R

The 1.23 A/R ratio on this Garrett GT47 turbine housing is a key design choice for high-horsepower applications. This specific housing is built for the GT47 series turbochargers, which are commonly found in heavy-duty diesel trucks and performance racing setups where managing exhaust gas flow is critical for optimal power delivery. The A/R ratio dictates how much exhaust gas flows into the turbine wheel, and a 1.23 ratio is chosen to help spool larger turbos effectively while still allowing them to breathe at higher RPMs.

Constructed from durable cast iron, this housing is designed to withstand the extreme temperatures and pressures associated with boosted engines. The open volute (O/V) design helps to distribute exhaust gas evenly across the turbine wheel, reducing backpressure and improving efficiency. This kit includes the turbine housing itself, ready to be paired with your GT47 turbocharger assembly. Proper installation is crucial for performance and longevity, so ensure you follow the manufacturer's guidelines for assembly and sealing.

When building a high-output forced induction system, the turbine housing plays a significant role in the turbocharger's overall performance characteristics. This Garrett housing is a well-built component intended for serious performance builds where precise control over exhaust flow and turbine response is paramount. It's important to note that this part is not CARB approved and cannot be shipped to California.