First take your bumper off, there's mad bolts, and plastic clips, make sure you get all of em off then yank off bumper, if you missed anything, your bumper will be fubar'd and won't ever go back on right again... no worries!
Measure where you gotta cut the stock piping. Measure once cut twice... wait... fuck it just cut the SOB. Use a vibrator saw or spinning cutting disc thingy
Should look like this once cut out
Clean off metal shavings (don't think metallic dust injection will cool down an intake charge the same way meth does). Bolt the ebay ic onto cut pipe ends, use reducing couplers and t-bolts clamps (i got mine from www.siliconeintakes.com). Ebay ic manufacturing tolerance was a little off, had to use a worm clamp on one side cuz t-bolt clamp wouldn't fit (a finger was almost lost trying to "make it fit"). Once its in place, measure out and make brackets to take load off the couplers/clamps. I used aluminum strips from the local Home Depot Racing.
Here are shots w/ 3 support brackets in place.
note: relocating the horn is a must, putting it where I put it will make it sounds either broken, or vintage. Probably should get an airhorn as supporting mod.
Here's how to make the brackets from raw aluminum strips. Follow closely, this gets complicated...
Pop the bumper back on, and try to remember where all the bolts and clips go. You will have a shitload leftover, hope that's not a big deal
Yea I know it sits a bit low, and doesn't fill out the mouth. That was on purpose, miatas already got heating issues when you turn up the boost and drive em hard. Feeding the radiator only hot air might not be a good idea. Putting in bigger shinier radiator and fans that add 3hp of thrust is recommended. This particular ic having centered inlet/outlets will require the small splash shield under it to be removed permanently.
Congratulations, you've now saved $350-$450 on a fmic kit from a real tuner company. You've risked a few digits, and possibly screwing up your bumper, but stuck it to the man.
This pic always makes me think....................... ♪♫ smile for me babe... lemme see ur grill ♪♫ <------------------must sing in skanky black chick voice