Made in USA. This Fuel Injection Fuel Filter Kit For -6AN is not our most glamorous fuel filter kit but it is one of our favorites because of the price and serviceability. Included in the kit are two 16MM-1.5 x -6AN metric o-ring adapter fittings and a replaceable GM Fuel Injection Filter (Part #G3727) that is readily available at parts stores and even discount stores. This kit is designed for use with 37 degree -6AN hose ends or 3/8 stainless tubing that is flared to 37 degrees.