UPDATED
finally 'fogged' the airbox yesterday, and some of you may have done it this way... took some pics to share.
i wouldn't mind so much on some beater, but the 2nd airbox hole and visible dryer hose look of the fogg mod just didn't feel right to me.
most of us know the trouble spot of the entire intake - the snorkel. other than that it's fine really. the surface area of the plastic air duct (sitting behind passenger hl) is almost twice that of a 3" hose. it then funnels down into the flex hose above the radiator fan, and it happens to be is almost 3" (70mm?) in diameter. it then meets the choking snorkel. the exit out of the airbox to the throttlebody is about 2.5" (62mm?). i didn't write down any measurements, so don't quote me.
i know 4" is the std method, but imo 3" is fine, and is keeping with the rest of the system. just replacing the snorkel, i can have a decent 3" duct all the way to the airbox, while completely maintaining the stock look. so i exchanged the 4" stuff i had for 3" parts. aluminum 3" duct (not pictured & not yet used), two 90* elbows, foil tape, and foil&foam insulation tape (for you heat-soak guys). $15. i already had mesh, weatherstripping, hose clamps, etc.
so here's the initial elbow i messed around with. DAMN, it was a near perfect match when i took the last piece off. it turns out i needed it. there wasn't a secure way to mount it this way. good thing i bought two.
here's the original
after getting the angle just right, i sealed every joint on the elbow with foil tape. press the tape down on the seam, then outward (like window tinting).
then i carefully wrapped the elbow with one layer of foam insulation tape for ducts. i removed the foil tape that's already on this stuff. it's weak and will fall off easily. note* the insulation foam tape works GREAT. checked it out after some driving, and while everything else in the area was HOT, the elbow was still very cool to the touch.
taped the whole thing again with foil tape, no seams, nothing loose.
the mock-up. i expanded the hole on the airbox to allow the 3" pipe to fit. no surprises there. i got very lucky and hot glue was not necessary to secure the duct onto the airbox. it is a VERY tight fit. removed the inner basket too. the damping material was all flaking off eveywhere. not pictured, but there is a mesh screen b/t the elbow and hose.
since the air duct is flexible, it's relatively easy to put back together in the car. it'll help if you don't initially bolt down the airbox.
i'd like to remove the resonator and seal the hole, but i don't want anything other than an oem delete. i would NOT recommend doing some hack glue job on this part since it's AFTER the air filter. you don't want to suck up chunks of glue or whatever debris into your engine. is there any ventilation benefit to having this "reservoir of air" anyway?
after fogging it's a very small difference in performance, but it is a difference you can definitely feel. eventually, i'd like to replace the plastic air duct and hose with the single piece aluminum duct for better consistency. wrap the whole thing in insul. it would fit perfectly into the plastic shroud. i'll update the thread when i do. comments welcome.
sry long post.