It works even better when you replace the whole exhaust system with 2.25", including the addition of a header. Of course, it is not a true CAI if you don't add the "I." Injection of forced air by way of a scoop or some other device.
I have made a noticable power difference in my NA with these mods. I wouldn't take it down to Kentucky to race Joe and my stock '94 XR2 can beat the pants off it, but there is a slight bit more pep off the line and top end is much improved making it a much better long-haul highway cruiser.
I'm still experimenting with easy ways to get air in there. My latest is to port the front air dam. I'll let you know how that works out, though Russ has told me that true CAIs may force more particulate matter into the system than was ever intended...I'll take that chance.
