Racing Sigma Turbo

The Tomioka Racing TR-TM1004 Sigma Turbo is a direct bolt-on upgrade specifically engineered for the Mitsubishi Lancer Evolution X equipped with the 4B11T engine. It offers enthusiasts a significant enhancement in the mid-to-top-end powerband, increased airflow capacity, and robust boost stability, all while maintaining a factory-style installation. Key features include a 3-inch inlet designed to support higher airflow and power potential, and a ported and polished turbine housing that optimizes exhaust flow efficiency. The included 1.5 bar / 21 psi actuator ensures strong boost control for performance tuning applications. The turbo utilizes a reliable journal bearing for cost-effectiveness and durability. With a compressor wheel measuring 61.4mm inducer / 82mm exducer and a turbine wheel of 67.1mm inducer / 58.8mm, this turbo has a power potential of up to approximately 550HP. However, this figure is a potential, not a guarantee, and is contingent upon supporting modifications such as fueling, intercooler, intake, and exhaust systems, as well as fuel quality and a proper engine tune. A professional ECU tune is absolutely required for proper operation and safety; the vehicle should not be driven hard without one. The TR-TM1004 is ideal for owners building a responsive street car with substantial top-end power or a track-focused setup demanding consistent airflow and boost. Included with the turbo are the wastegate actuator, oil pipe, water pipe, and gasket(s). Recommended supporting modifications include a professional ECU tune, a high-flow intake compatible with the 3-inch inlet, an upgraded intercooler and charge piping, potential fuel system upgrades for higher power targets, and a free-flow downpipe and exhaust system.