I did a search and saw that quite a few members on here have done this mod DIY style but there weren't very many pictures or anything that really stated exactly what parts you need. Any Pictures or Inventory would be a great help.
The noise compared to the air intake of the skimmer (even with the silencer) is negligible. I'm not sure where any additional noise would be generated on this type of mod- if anything it should be more quiet than stock.