Supply your 3/8" threaded water/meth pump with fuel system-grade 6AN hose. If you're flowing 70/30 or richer, this is what you want and what the race tech scrutineer will expect. Internal flow diameter is a healthy .34" (8.64mm). Compare that to the usual Nylon hose diameter of just .125" (3.18mm). This produces a huge 7x jump in flow area!
Note: Priced per foot.