And for the record, I'd like for someone to show me - with an actual dyno plot - that a small plastic bypass valve hurts the performance of a CAI.

The bypass valves do not open unless the main filter has choked on water.

And even if the bypass valve diaphragm was to fail in the open position, the relative temperature difference for a small percentage of total intake air has a negligible effect on cumulative intake air density. In other words, if there's any loss due to the use of a bypass valve, I'll bet it's in the range of 0.4 hp at the most.

As mentioned above, I'd like for someone to show me - with an actual dyno plot - that the use of a bypass valve drastically hurts the performance gain of a CAI.

So bring it, foo.