What can you tell me about the 74mm TB?

[KRAM36]

Originally Posted by Jake Raby

The larger TB will usually hurt torque and only gain marginal HP, but over a very narrow power band. This is due to the intake plenums of the Boxster engine, as well as runner characteristics.

All combinations will vary in performance gains.

That ending line is your saving grace. I can tell you without a doubt, cross my heart and hope to die, that my intake mods has made my car a beats. It has not lost any torque or a narrow in power band. My car is flat out hauling through the whole RPM range. I don't need a dyno to tell me the car has gain a substantial performance gain. It flat gets with it. Do it right and you will be rewarded.