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VJ should have included a before dyno run in the same environmental conditions as he tested the UDP afterward. I think you loose 10~15HP between seasonal air densities. It can be difficult to track small power gains sometimes.
My Boxster gains about this +10hp... when the wind blows from behind loll
Perhaps he forgot to install the shorter serpentine belt required to make the kit working?
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'97 Boxster base model 2.5L, Guards Red/Tan leather, with a new but old Alpine am/fm radio.
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