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Ive just had a dyno test on my Boxster S, 2000 model, 158 000km, RHD, daily driver.

I have a 'dip' in the graph readings for both power and torque between 5 800 - 6 300 r/min - see attached.

Any thoughts as to what this could be caused by?

No misfires or any other symptoms. Scanner shows no fault codes.

Im satisfied with the results, bar the 'dip', as the flywheel HP is usually about 12% more than is achieved at the wheels.

Boxster HP graph.pdf

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