Holley EFI BILLET FUEL RAILS - LSA/LS9

Holley Hi-Flow Fuel Rail Kit – ZL1, CTS-V, ZR-1 Compatible

Dress up your engine bay and unlock more performance with the Holley Hi-Flow Fuel Rail Kit, designed to fit ZL1, CTS-V, and ZR-1 applications. Whether you’re running a factory supercharger or an aftermarket unit designed for OEM rails, these fuel rails deliver superior flow and a clean aesthetic upgrade. With a sleek bright-dip black anodized finish and laser-etched EFI logo, this kit is both functional and stylish.

Engineered for high-performance builds, the kit includes machined -8 ORB and -6 ORB ports for flexible plumbing options and supports high-horsepower fuel flow needs with a massive 21/32” main passage and ¼” injector feeds. Brackets are included for use with factory-height injectors (33.60mm). Compatible with factory fuel lines when used with P/N 534-211 adapter kit (sold separately).

Key Features:

• Direct replacement for OEM rails on factory or compatible superchargers
• Bright dip, black anodized finish with laser-etched EFI logo
• Machined -8 (3/4-16) ORB ports with O-ring fittings for secure sealing
• Four -6 (9/16-18) ORB ports per rail with included plugs for unused ports
• Option to add fuel gauges, sensors, or pulse dampers using ORB adapters (sold separately)
• 21/32" main fuel passage supports high horsepower builds
• ¼” diameter feed to each injector for optimal fuel delivery
• Includes brackets for 33.60mm factory-height injectors
• Compatible with OEM quick-connect fuel lines via P/N 534-211 (sold separately)

Fitment:

Designed to fit Cadillac CTS-V, Camaro ZL1, and Corvette ZR-1 with factory blowers or aftermarket superchargers using OEM-style fuel rails.

Upgrade to Holley’s Hi-Flow Fuel Rails for unmatched reliability, clean looks, and the fuel capacity needed to support serious horsepower.