Flexline Kit Rear 05-14 Mustang

The Flexline Kit Rear 05-14 Mustang by WILWOOD is a DOT-approved brake hose assembly engineered for fifth-generation Mustang owners seeking improved brake line routing and durability. This rear brake hose kit replaces factory rubber lines that deteriorate over time, crack under pressure, or fail to meet the needs of modified vehicles running upgraded brake components. Whether you're installing a new brake master cylinder, upgrading to larger rotors, or performing a complete brake system overhaul, this flexline kit provides a reliable, street-legal solution that handles both daily driving and spirited road use.

Built from braided stainless steel construction, the Flexline Kit Rear features 18-inch hose lines with 3 AN straight inlet and outlet fittings, delivering consistent brake pressure without flex or expansion under hard braking. The braided stainless design resists abrasion, heat cycling, and corrosion far better than OEM rubber lines, making it ideal for track-focused builds or environments with aggressive underbody temperatures. The 3 AN fitting size (3/8-inch SAE) is the industry standard for rear brake circuits on Mustangs of this generation, ensuring proper flow rates and pressure integrity during dynamic driving. WILWOOD's engineering ensures this kit maintains DOT compliance, meaning it meets federal safety standards for automotive hydraulic brake systems and passes pressure testing requirements.

Brake enthusiasts, weekend warriors, and professional tuners favor this flexline kit for rear brake system installations on 2005–2014 Mustangs because it eliminates the weak point of aging rubber hoses and integrates seamlessly with both stock and aftermarket brake setups. Installation requires no modifications to the Mustang's frame or brake hardlines; the kit's 18-inch length accommodates standard rear suspension geometry and passes through existing routing channels. Owners upgrading to multi-piston calipers, performance pads, or larger rotors will appreciate the hose's ability to handle increased brake temperatures and repeated pressure cycling without degradation. Weighing just under one pound, this lightweight assembly contributes minimal unsprung mass while delivering measurable improvements in brake pedal feel and stopping consistency.