Trying to use flex hoses is a nightmare. Why not plumb the system with 1/4" diameter hard lines, maybe the easy to bend green-colored copper/nickel tubing that's used for fuel and brake lines? They come in various lengths, with double flares and inverted flare nuts already installed, so all that needs to be done is to install the proper adapter fittings to go from pipe threads to inverted flare female on both ends. If you desire, you can make a 360 degree vibration loop in both tubes by wrapping them around a large 1/2" drive socket or a piece of PVC pipe. The only reason for flex lines on the original filters installed at the dealer was to make it easy to find a mounting point on the intake manifold for various makes and models of engines. Hard lines also eliminate the danger of getting a flex line too close to an exhaust pipe and melting it, resulting in a massive loss of oil and an engine failure.
Jerry
