Our exclusive 4B hose provides a coolant loop to your in tank heat exchanger while keeping your vegetable oil supply line hot from the tank to the engine.  Our exclusive hose consists of 2 – 1/2″ coolant lines, 1 – 3/8″  vegetable oil return hose and our exclusive 1 – 3/8″ clear view vegetable oil supply line.  This Clear View hose is the first clear vegetable oil fuel line that can withstand any type of fuel, pressure and heat and still retain it’s elasticity in cold weather.  This hose is an indispensable window into the flow of your fuel system and is an unparalleled educational and diagnostic tool.  It allows you to visually confirm what fuel you’re running on along with diagnosing air leaks and fuel flow problems. This hose also includes 3 – 12 gauge wires for your pump, sending unit and filter heaters allowing you to connect your system components in one easy step.  This fuel bundle is insulated and protected by a rugged rubberized PVC sheath.

4B hose is sold by the foot in our shopping cart. Please indicate how many feet you need by changing the quantity accordingly. Example Qty 20 = 20 feet of 4B hose.