10AN Inlets / Large Seat / Carbureted (4-12 PSID)Universal CARB Adjustable Fuel Pressure Regulator, 4-12 psi, (2) -6AN Inlets, (1) -6AN Return Regulator Features Black Two -6AN inlet ports and one -6AN return port Gasoline, diesel, methanol, and ethanol fuel compatible Billet Aluminum with anodize per military MIL-A-8625, Type II Fine thread pitch for precise pressure adjustment Versatile mounting bracket and stainless steel hardware 1/8 inch NPT gauge port with plug for external pressure gauge 1/8 inch NPT pressure reference port with barbed fitting Backed by a limited lifetime warranty