12 whp
I have dyno test from Import tuner reporting 13.9 WHEEL hp for the 94-2001 GSR, 10 wheel hp for the 96-2000 non-vtec civics and 12 wheel hp for the Civic Si(R). I have one insatalled on my own car and the difference is enormous. Of all the mods i have done, the CAI ist by far the most efficient and cost effective. For under $400 tax in that works out to about $33 per horsepower. Say what you want but for my money, the AEM is the only thing that works that well.