Reduced Restriction. Upgrade your 2011-2017 Mustang GT fuel system with BBK Performance high flow aluminum fuel rails. BBK Performance Mustang fuel rails are recommended for higher horsepower applications where larger fuel injectors are used. Our fuel rails feature a larger than stock inside diameter to ensure adequate fuel is supplied to your high horsepower engine. Top Quality Construction. BBK Performance fuel rails are CNC machined from billet aluminum to precise tolerances and offer much improved fuel flow over stock rails, making them ideal for high performance applications. These rails will eliminate fuel pressure restriction to your engine. Easy Installation. The kit includes our precision machined billet aluminum fuel rails mounting hardware brackets and hose connectors. These rails are designed to fit factory intake manifold and most aftermarket intake manifolds. Some aftermarket coil packs are taller than factory and may interfere with these large diameter rails.