This video covers the installation and operation of the Awron exhaust valve controller on a BMW G8X M3/M4. The system allows full manual control over the factory exhaust valves for increased sound ...
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Does the J Pipe Install Really Transform the G82 M4
We installed a Supersprint J Pipe on our G82 M4 and tested three setups back-to-back: stock, resonated, and non-resonated. In ...
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