A few months back I bought a cold air intake off of ebay for my 91 Si (D16A6). My car is fairly stock (its my beater) other than exhaust and suspenion goodies so a figure i'd through a CAI on if for better gas mileage and maybe a few extra hp. The install was pretty straight forward and the fit was good for a $20 intake.
The results were not very impressive, i noticed no power gains or no better mpg. What i did notice was that driving in the rain this thing sucks water big time. While driving in the rain any time i went over 50% throttle the car would start to missfire and bog due to sucking in water. This is the 4th car i've owned that i have used CAI's on and it is the first time i have ever had problems with it suckin in water.
Since then i've simply removed the lower pipe from the CAI and put the filter on the end of the upper pipe to make a basic short ram style intake, no more sucking water.
Here is a pic of the sytle of intake used.
Hope this reveiw helps someone out.
The results were not very impressive, i noticed no power gains or no better mpg. What i did notice was that driving in the rain this thing sucks water big time. While driving in the rain any time i went over 50% throttle the car would start to missfire and bog due to sucking in water. This is the 4th car i've owned that i have used CAI's on and it is the first time i have ever had problems with it suckin in water.
Since then i've simply removed the lower pipe from the CAI and put the filter on the end of the upper pipe to make a basic short ram style intake, no more sucking water.
Here is a pic of the sytle of intake used.

Hope this reveiw helps someone out.