Turbosmart 6466 T4 Divided 0.84AR Externally Wastegated TS-1 Turbocharger

The turbine housing on this Turbosmart TS-1 turbocharger is divided, meaning the exhaust pulses from each cylinder bank enter the housing separately. This design helps prevent exhaust reversion, which can improve throttle response and reduce exhaust manifold pressure. The 0.84 A/R ratio on the turbine housing is a good balance for many performance applications, offering a solid boost threshold without sacrificing too much top-end power. It’s built around a T4 divided inlet flange, a common size for many aftermarket turbo manifolds.

This turbocharger features an externally wastegated design, which gives you more control over boost pressure compared to an internal wastegate. The wastegate is a separate unit that controls exhaust flow around the turbine wheel, helping to maintain consistent boost levels. Inside, you'll find a durable ball-bearing center housing rotating assembly (CHRA). Ball bearings reduce friction and allow the turbo to spool up faster and handle higher shaft speeds than journal bearing turbos. The compressor wheel is a 66mm unit, designed for efficient airflow in performance setups.

This is a serious piece of hardware for someone looking to build a custom forced induction system. It’s important to note that this turbocharger is not CARB approved and cannot be shipped to California. Proper tuning and supporting modifications, such as an upgraded fuel system and exhaust, will be necessary to get the most out of this turbo and ensure reliable operation.