MMR Fuel Rails for Edelbrock Manifold These Billet Rails from MMR are a direct bolt on to the Edelbrock manifold and are constructed of 6061 Billet aluminum and are the highest flowing rails available! Save $! MMR rails use AN8 Fittings not leaky Pipe fittings! Complete Kit with Lines, Fittings and adjustable pressure Regulator to attach to 96-98 Vehicles or 99-04 that have been converted to Return style fuel system.