For those looking to maximize flow from their water-methanol system, the Hi-Flow Pump Supply Upgrade is a must-have! This Upgrade replaces the standard 4an feed line with a larger 6an line capable of greater flow, thereby increasing your system's capabilities! Customers with older pump designs may need to purchase a SNO-40900UHA-B for an updated top that can accept the new fittingsIncludes3Ft of 6an Stainless Braided HoseTwo, 6an-3/8" Straight Fittings to replace your current ones in the tank outlet and pump inlet