[Johnny Danger]

In the case of a normally aspirated engine like the boxster, there's really nothing to be gained from an ECU tune alone. In fact, even in cases when a complete exhaust modification has been performed, to include plenum, throttle body, air intake ect..., the only real benefit to having an ECU tune at that point, is to adjust the air/fuel ratios in order from the ECU to adapt to the new changes. With that said, the only performance gains that one should expect to see, are perhaps an improvement in throttle response, better fuel economy, along with a slight blip hp/torque figures.