2002 Mazda 6 Luxury Sports
Interesting, thanks for this. I've also modded my airbox; still have the snorkel but have taken out all the baffles and restrictors inside the upper airbox (where the filter is), and have simply blocked off the hole to the bottom half of the airbox, which is used for sound dampening. This is definitely a noise mod IMO; even a proper CAI would only maybe at best give 1-5HP gain if we're talking a proper one like this which goes down into the fender. Note that they say 11hp gains max, but I don't buy it without a tune as you said.