Overview Reviews Product Description 534-203 Holley EFI LS Fuel Rail Package for EFI Hi-Rams and single plane EFI fuel rails are machined for –8AN O-ring Fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system. Product Videos Custom Field Product Reviews Write a Review Write a Review × 534-203 Holley EFI LS Fuel Rail Package for EFI Hi-Rams and single plane Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *