I have my full NA system now installed on a P5, and car is running exceptionally well...i went to this system from a stock intake with a drop in K&N, twiggy cams, Mp3 computer, Mazdaspeed header, and RB cat back with custom mid pipe...throttle response is outrageous, and the sound with these cams...it really seems like a different car...
Please wait for Rich's template (I'd be happy to give feedback with that rich when you start playing around with it). I spent a good 3 hours back and forth slowly making adjustments to the box sidewall, but now knowing exactly what needs removed...i could do it literally in less than 30 minutes. I just used a 5 speed dremel with a cutting wheel and a stainless 'bar bur' to finish smoothing the edge...the rubber trim still fits perfectly...from the engine bay; you'd never know i had to do anything...i'm not perfectly finished, but have it close enough to fit everything and do a few test drives...
so to anyone worried about taking this on, don't be...my gf could've done it...and its an area so hidden, you'd never be able to tell...
some pics of it installed...i had the car parked in 90 plus degree sunlight, and my plexi glass epoxy let loose...so the top is now sitting downstairs with a fresh bead of high temp gasket maker, and a few clamps...i'm sure that'll hold the glass on fine, and i was probably just unlucky with that...easy fix if you run into it, though...
https://docs.google.com/file/d/0B9wG_iZEqPQNb1l2Vjl2a2xLRkE/edit?usp=sharing
https://docs.google.com/file/d/0B9wG_iZEqPQNUk11U0Q1cU11eFU/edit?usp=sharing
https://docs.google.com/file/d/0B9wG_iZEqPQNZjZNaFU1S0FNcDg/edit?usp=sharing
sorry about the bad lighting, and again, this was only a test fit to make sure everything fit ok...i'm going to run that coolant line under the maf to hide it, and do some more work on the stock reservoir bracket and mounting location...i need to trim it a little, as you can see from one of the pics...but it easily fits in front of the battery on the remaining stud from the stock intake...i just had to drill one of the holds out about 1mm to fit it over that exposed stud...and used the same 10mm nut to tighten it down...
and Rich, exactly what sleepwalker said...you offered by far the greatest intake system that ever became available for these cars...some slight modification to a completely custom designed limited run product is completely ok imo, and i'm sure others...when people see how little work is involved, there won't be any issues...Couldn't be happier with this thing man, one of my favorite mods so far...and i've been messing with this thing for 11 years haha.