Nothing special with it...one good foam filter and a wall of isolation material that seals around the bended plastic piece and to the underside of the hood.....
I did mine a little different,I used a 3 inch exhuast turndown going through the metal and placing the filter under the car.
I did this to be able and fit the SMC alky kit and relocated the charcoal cannister in the process.The black plate that holds the cannister was removed as well as a triangle brace under the front fender to let the airfilter fit.No MAF reading probs whatsoever.And IAT are 1-2 degrees above outside air temps.