Overview Reviews Product Description 534-230 Holley EFI Billet LS7 Hi-Flow Fuel Rails Holley EFI's Billet LS7 Hi-Flow fuel rails are a perfect match for anyone wanting to unleash the full potential of their LS7 powered Hot Rod. These Billet fuel rails are designed to be with OEM LS7 Intake manifolds and OEM LS7 Injectors. Product Videos Custom Field Product Reviews Write a Review Write a Review × 534-230 Holley EFI Billet LS7 Hi-Flow Fuel Rails Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *