1964-69 Rambler American Fuel tank sending unit 3/8" for greater performance over original 5/16" unit, comes with Filters & O-Rings. Stainless steel. Patterned after original. All parts and necessary gaskets for installation are included as shown. Pre-calibrated at the factory. Brand New.
Why use a larger 3/8" fuel sending unit? A larger 3/8" diameter can move more fuel than a smaller 5/16" diameter. It will be able to deliver more fuel per unit time making it suitable for higher horsepower engines.