Hi. I have an 03 IS300 and was looking into running dual coolers (for auto transmission and power steering) and have a few questions regarding what I need for fittings. The factory lines for the transmission and power steering is 3/8 inner diameter. Which fittings would I need in order to be able to adapt an AN fitting onto my factory hoses? Not familiar with the AN system of sizing hoses. What would be the most similar diameter for my factory 3/8 ID hose (-6AN or -4AN perhaps)? Thanks.