Tomioka Racing Sigma turbo for Mitsubishi Evolution X now comes in Billet compressor wheel! The billet compressor wheel guarantees more flow than the standard compressor wheel and delivers more power capacity for the turbo. This turbo is designed for mid to high power band and great for street and track applications. The turbo still features the larger 3-inch inlet for higher and optimum air flow. The turbine housing comes fully ported and polished for even faster flow! The turbo includes an upgraded billet internal wastegate actuator with high pressure spring for maximum performance and quality above all else!