Just installed air intake on 1.5L!

[cali yaris]

IMO, all you get with most CAI installs is a bit of noise that some misinterpect as increased performance and a "WOW" factor when you open the hood.

Like RedRide stated before, its seems purely a WOW factor.

Then I got a gain of 15 whp from a pulley, header and axle-back exhaust. Went from 92 to 108 whp.

You're saying the intake contributed nothing to that change in numbers, as measured on the same dyno, with reasonably close ambient temp and humidity? c'mon guys.

This argument just won't die. A well designed intake that lowers intake temps and increases flow makes some power; maybe not a lot -- but some.

And mods add to each other's increases -- I believe ilikerice has agreed to this in other threads. (but maybe it's my wishful thinking)

/rant