06/01/2026
Here we are putting down a baseline dyno pull on a stock Riviera Blue BMW M4 CS to see what it puts down on 91 octane unmodified. The G82 M4 CS is factory rated at 550 AWHP though stock dyno runs often show 450-480AWHP depending on conditions, today this G82 M4 CS put down 515AWHP on our dyno on 91 octane. Did you guess correctly on our previous post?
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