Holley EFI Billet LS7 Hi Flow Fuel Rails: A Great Place to Start

By: Todd Veney08/14/2017 < Back to Blog Home

When it comes to flexing LS7 engine power, start with your fuel system. Holley EFI’s Billet Hi-Flow fuel rails provide less restriction and allow even fuel distribution for optimal injector supply. The larger 5/8-inch inner diameter will support up to 3000 horsepower flow capability while helping decrease fuel-pressure drop and canceling out pressure pulses. The fuel rails are machined to accept 8AN O-ring fittings, providing additional inlet and outlet ports for easy plumbing. The Holley EFI logo is laser-etched and the black-anodized finish provides long-lasting durability and show-car looks. All the brackets and hardware for a hassle-free installation are included.

Numerous kits are available to fit your needs. Part number 534-230 replaces existing fuel rails on your LS7 engine and connects to the stock injectors and fuel system. For more versatility, part number 534-231 comes with the same components and six feet of braided hose and 6AN fittings to customize your install. If you're connecting to the GM factory fuel line, an adapter kit (part number 534-211) is ideal for connecting directly to Holley EFI fuel rails.

Part number 534-232 allows the use of Holley EFI injectors – both EV1 and Bosch-style – allowing you to maximize power. Part number 534-233 includes six feet of braided hose and 6AN fittings to customize your install. Just pick up the a GM 3/8-inch quick-connect-release tool to disconnect the factory fuel line before you start your project – they're inexpensive and available at local auto parts stores.