Return Style Fuel Line and Filter Kit for LS Engine Swaps
The Return Style Fuel Line and Filter Kit solves the common challenge of maintaining consistent fuel rail pressure and keeping debris away from sensitive injectors during LS swaps. Built with PTFE inner cores wrapped in stainless steel braid and a protective jacket this assembly holds 58 psi under heat soak or heavy load while resisting modern ethanol blends. An aluminum housing filter with high flow media captures contaminants before they reach the rails and installs cleanly on early LS engines with the included fittings and clamps. With its precision routing and corrosion resistant materials this kit supports reliable operation in demanding under hood environments.
Stainless Steel Braided PTFE Lines for Ethanol and Abrasion Resistance
The fuel supply and return hoses use a smooth PTFE inner core wrapped in a stainless steel braid and a protective jacket, delivering exceptional chemical compatibility with modern ethanol blends. This combination prevents inner wall swelling and ensures the lines remain dimensionally stable under pressure, even when exposed to aggressive fuel mixtures. The braid also provides robust protection against abrasion and mechanical wear, safeguarding nearby wiring harnesses and painted surfaces from rubbing damage. With a burst rating of 58 psi, these assemblies maintain steady flow under heat soak or heavy load, preserving injector performance in demanding conditions. The integration of PTFE and stainless steel results in a compact yet resilient line that simplifies routing in tight engine bays.
Return Flow Design Maintaining Consistent 58 PSI Rail Pressure
This return style layout is engineered for early LS rails equipped with on-rail regulators and continuously circulates surplus fuel back to the tank to hold rail pressure at an exact 58 psi. By keeping fuel moving through the rails, the system reduces the risk of vapor lock during spirited driving or in hot under-hood environments. The open-loop routing matches OEM mounting points for a clean, manufacturer-style installation that avoids awkward bends or kinks. Steady pressure not only ensures uniform injector spray patterns but also extends injector service life by preventing sudden spikes that can damage internal seals.
Precision Machined Aluminum Filter for Debris Removal and Quick Maintenance
The billet aluminum filter housing resists corrosion and maintains its integrity under constant exposure to fuel and heat, ensuring reliable service in harsh engine bays. Inside, a high flow media element captures contaminants before they reach the injectors, protecting the entire fuel system from abrasive particles. Routine filter element replacement is tool-free, allowing fast service without removing the housing from its mounting point. This ease of maintenance minimizes downtime and reduces the chance of fuel starvation caused by clogged elements. The filter housing also features precisely machined ports that align with included AN fittings for leak-free connections.
Corrosion Resistant Hardware and Professional Fit for Early LS Engines
Every component in this kit is made from corrosion resistant materials, including stainless steel clamps, black-anodized fittings and zinc-plated mounting hardware to withstand road moisture and salt spray. The two-piece AN fittings and assorted adapter connections provide a seamless link between fuel lines, filter and tank without extra parts or custom fabrication. Line clamps and brackets are shaped to hold the hoses securely against engine block and frame surfaces, reducing vibration and wear over time. Because this assembly was designed with early LS applications in mind, installation is straightforward and yields a clean, factory-style appearance under the hood.
Built for consistent performance and reliable operation in LS swaps.