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BMW M135i manual gets massive power upgrade

This video shows how a manual BMW M135i is tuned to Stage 2 using only an iPhone and the MHD app, then tested on the German Autobahn. After upgrading hardware components like the intercooler, charge ...
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Tuning My Manual BMW M135i to Stage 2 with an iPhone! Autobahn POV Test

Can you really tune a manual BMW M135i to Stage 2 with just your iPhone? YES — and we did it! In this video, watch the entire process and then join us on the Autobahn to feel the raw power difference ...