Precise, accurate, and reliable fuel control unmatched by any other fuel pressure regulator. Set idle pressure separately from high-end settings. No jets, pills, logs, or barrel valves req'd. The easiest to plumb & use, as well as the most accurate method of metering pressure control using a mechanical pump. Ideal for use with Aeromotive mechanical fuel pumps. Fully compatible with alcohol fuels. Type II bright dip anodized finish protects the 6061 T6 aluminum alloy body and cap. Features O-ring style ports: -8AN inlet, three -8AN outlet, and -10AN return. The port design provides flexibility for single or dual carburetors.