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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 compares JCR and Akrapovic exhaust systems, highlighting tone, volume and ...