MuchBoost S55 3.0 Twin-turbo Upgraded Turbochargers with a Custom Billet Compressor Wheel and Enlarged Turbine Wheel. They are based on original Mitsubishi turbochargers which means that the installation is 100%P&P. The turbochargers are meant to work with BMW M3, M4 with S55B30 431HP engines. The turbo delivers up to 162% (269HP extra) of power over the factory […]