Fuel Filters - Inline Fuel Filter Style - 5/16 in. Inlet Find Fuel Filters with Inline Fuel Filter Style and 5/16 in. Inlet Size and get Free Shipping on Orders Over $99 at Summit Racing! 5/16 Fuel Filter | eBay universal inline plastic gas fuel filter size: 5/16 " 4" length. fuel filter can be used for tractors,cars, trucks, motorcycles, rv's and any gas powered engine. see thru design allows you to see if g..