I used the stock intake tube for now. The square end of the rubber 90 degree elbow that came with the kit fit perfectly up to the square end of the stock intake tube. I cut out the tube, ( trimmed the lip a bit on the 90) and it actually snapped into the land area of the 90 almost perfectly. I JB welded it for cheap insurance, put it all together and without the separator running, I was only pulling a 1/4” of vacuum at the filter box drain hole from idle to WOT. I think eventually maybe in the off season, I will re plumb to include the CVT, the separator has plenty of CFM’s to supply both, even though I probably don’t need to but you know how that goes LOL