MuchBoost S63 4.4 Upgraded Turbochargers with a Custom Billet Compressor Wheel and Enlarged Turbine Wheel. It is based on an original Garrett which means that the installation is 100%P&P. The turbochargers are meant to work with BMW M5 F10, M6 F06/F12/F13, X5 M F15, X6M F16, X5 M E70, and X6M E71 with S63N/B44 555-600HP engines. […]