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BMW M340i with legal Akrapovic exhaust sound test

In this video we test a BMW M340i fitted with an Akrapovic titanium exhaust and a 200-cell HJS downpipe. The setup improves ...
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Porsche GT4 dyno sound test

The Porsche 718 GT4 RS is tested on the dyno, revving to 9000rpm with its 4.0 naturally aspirated flat six. This video ...