Sh0velMan

I bet you it results in an up-tick in torque. Pressurized air causes tubes to have different (Higher, I would think) resonant frequencies, meaning an intake runner tuned for 7500RPM on this engine may be tuned for much higher at more than 1 atmosphere of boost.

Edit: Which is to say, an intake tuned for a lower RPM (like the HR intake) would benefit our engine in that case because it pushes the resonances back down into a usable range.

The spacer mentioned above does the same thing, increases volume of the runner, thus decreasing resonant frequency.

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