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BMW sports sedan showcases performance on the Autobahn

In this video, we test a modified BMW equipped with an MHD Stage 2 tune and an Eisenmann exhaust system on the German ...
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Manual BMW M135i stage 2 tuning test drive

This video shows how a manual BMW M135i gets a massive performance boost using only an iPhone and the MHD app. After installing key hardware parts, the Stage 2+ flash unlocks serious power—dropping ...