Turbocharger Stage 1 Turbo Systems for BMW B58B30O1 Gen 2 G-Series - B58G2ST1 - Turbosystems upgrade turbocharger for BMW B58B30B features: reinforced thrust bearing; enlarged machined from the solid compressor wheels; enlarged turbine wheels; machined enlarged housings; new shafts; balanced on VSR; Power range: Stage 1 - 600+ HP; Stage 2 - 700+ HP; Stage 3 - 750+ HP; INSTALLATION NOTE: stage 2 & stage 3 versions require an aftermarket intake pipe, which can be added as an option with this turbocharger. Part number: 11 65 7 934 387 Compatible with BMW G-series models equipped with gen 2 B58 engine turbochargers: M240i(X) Coupe G42 M340i(X) Sedan G20 M340i(X) Sedan G20 LCI M340i X Touring G21 M340i X Touring G25 LCI M440i(X) Coupe G22 M440i(X) Convertible G23 M440i(X) Gran Coupé G26  X3 M40i X SAV G01 X3 M40i X SAV G01 LCI X4 M40i X SAC G02 X4 M40i X SAC G02 LCI