Overview Reviews Product Description 9900-173 Holley EFI Fuel Rail Kit Left and right, bright clear anodized, extruded aluminum fuel rails, stainless steel crossovers and adjustable fuel pressure regulator for Chevrolet Big Block V8 with Holley MPI Manifolds. Product Videos Custom Field Product Reviews Write a Review Write a Review × 9900-173 Holley EFI Fuel Rail Kit Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *