Title pretty much sums it up. I have a stock [catless] header pipe with 12mm o2 bungs. Anyone have a recommendation for someone around Atlanta who can install 18mm wide band o2 bungs? Based on looking at fuelmoto jackpot, etc it appears they are going up by the exhaust port and not down by the cats so someone with a little experience knowing where they should be placed and at which angle would be a good thing to know in addition to some good welding skills.