Amazon: Wix 33003 (3/8") In-line Fuel Filter, Pack of Mar 28, 2016I bought these to replace the fuel filter on my Kubota BX25D tractor. The Wix 33001 showed up as an alternate when I searched on Amazon, but the 33001 is for 1/4" fuel line and was too small. The 33003 is actually for 3/8" fuel line, and my BX25D actually has a 4.7/5(44)Price: $27Brand: Wix Wix Filters Fuel Filters - 3/8 in. Inlet Size - Free Find Wix Filters Fuel Filters with 3/8 in. Inlet Size and get Free Shipping on Orders Over $99 at Summit Racing!