Lighter turbine vs OEM. Less turbo lag compaired to stock because of lighter turbine. Custom CNC milled turbine. Longer Turbo life with billet wheel as intake temps are cooler with a more efficient design. Stock Turbo specs 39/40 inducer/exducer. 6+6 Billet compressor wheel. 360 Thrust bearing system. Stock turbo hits CFM ceiling at ~20psi above this point the turbo will just create boost by increasing the temperature. Requires billet drain tube if turbo is a bolt together center oil section vs the newer V-band clamp center section.. If adding this to a XP Turbo Model select the water cooled upgrade kit..