Engineers at Grams Performance Design have developed a Fuel Rail system for popular modern muscle applications. The Grams billet aluminum fuel rails make a great addition to your high performance fuel delivery system with quick connect OE drop - in compatibility and big fuel delivery The Grams Fuel Rails are larger than stock for high horsepower applications, machined from Billet 6061 Aluminum and hard anodized for corrosion resistance. The rails use - 8AN fittings to aid in delivering consistent fuel pressure across the system while delivering more fuel at the injector.