wet leaves will not be a issue with this intake, it sits where the old air box used too sit, safe from water, debris such as wet leaves... one of the reasons i got the kit... the second reason i got the kit was beacuse it came with a mounting bracket for my PCM with rubber grommets and the works, the pcm is safe fastened down and secure now and is not retro fitted too anything, it came with an adapter set for my MAF sensor, and a heat shroud that separates the air filter from the engine bay that fits the engine bay like a glove... could have easily made my own set up for much cheaper admittedly... BUT that takes a lot of time screwing around, and i do not have a regular 40 hour a week job, i work 6 days a week sometimes 12 hours a day a 2nd shift job plus i am a youth group leader so on the weekends i am doing that... no time for fiddle faddling at minards and autozone Napa Orelies too peace together my own kit... thats why i got the K&N kit and didn't make my own, would have had more fun making it myself but i have no time, takes a hour or less too install the kit in my car vs hours of tinkering cutting measuring parts finding....