This XR2 Series HE351 Turbocharger comes with an upgraded Billet Blade Technology 62mm compressor wheel as well a larger 10 blade turbine wheel. The Billet Blade Technology compressor wheel is designed to increase turbo efficiency to help lower EGT's while adding strength and reliability. Perfect match for a set of Industrial Injection 13% Over Injectors. During our testing just the XR2 and DFLY injectors made 400 hp to the wheels.