Holley HP In-Line Billet Fuel Pump 12-890 | Holleys HP In-line billet fuel pumps are designed to be the perfect companion to your carbureted or fuel injected street vehicle, race car, off-road truck or any engine needing fuel! The HP fuel pumps feature OEM gerotor technology which yields lightweight, quiet operation and 100,000 mile durability in a cost effective, attractive package. HP fuel pumps are gasoline and diesel compatible and can be used in racing applications with 18.5 volt charging systems up to 80 psi.