I see a lot of Corolla air intakes for sale on e-Bay, but have never bought one.I was thinking about it, but question if it is much of a gain.
I have a short ram intake on a 99VE. I've tried multiple 1/4 mile runs with stock, the short ram, and the short ram with a cold air hose. There is no acceleration improvement, even when a new K+N cone is compared to a stock filter with 20K+ miles on it. There might be a perforamnce gain with much larger, compressor fed, and/or higher reving engines that need a lot of airflow. I just keep the short ram on my corolla because the intake sounds decent at high throttle. I prefer having a bit of engine noise and intake valves chopping air sound better to me than an obnoxious muffler.
/Dan
That still doesn't prove that a CAI doesn't produce a few more HP. At most, maybe 5BHP, but that isn't really going to change the 1/4 times.
Even if you did all your testing on the same day, and got the exact same 0-60' times, and drove perfect the exact same time, you still probably wouldn't get enough difference from a CAI or SRI alone to change your 1/4 times. You would probably get better fuel economy with a better intake though.
We've gotten 43MPG with a TRD drop in before.