For you guys that are using a short route style intercooler piping(meaning your piping isn't plumbed through to the stock UICP location), I have another very cheap SD CAI intake setup that'll run you about $20-$30.
First up, grab this off of ebay.
http://cgi.ebay.com/ebaymotors/88-89-90-91-Civic-CRX-EX-Si-Short-Ram-Air-Intake-Kit-_W0QQcmdZViewItemQQhashZitem5d2fc5b472QQitemZ400233444466QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories It's an intake for an 88-91 CRX Si, but it HAS to look like the picture given, there's another weirder style out there that isn't as easy. Now, what you do from there is grab just any old non silicone couple you can find all over eBay for $5 that come with worm clamps.
From there, just cut anywhere in the red box given.

The coupler that comes with the intake kit, fits over the a 14b/16g/20g outlet just fine, as it is 3", and so is the piping. From there, take the 90* portion you have left from where you cut the pipe, throw on the other coupler and it puts the filter in the stock SMIC location.

It's true 3" aluminum piping so it's very light, and even has a little spot to hook up your VC vent.
Here's a picture for more reference of what you should look for in the end product. Not bad at all for $20, huh?

