Return Style Fuel Line and Filter Kit for LS Engine Swaps
If you are retrofitting an LS motor into an older chassis and need to maintain precise fuel rail pressure, the Return Style Fuel Line and Filter Kit is engineered to send surplus fuel back to the tank and defend injectors from debris. Built with PTFE inner cores wrapped in a stainless steel braid and protective jacket the lines hold 58 psi even under heat soak or heavy load while resisting modern ethanol blends. An aluminum housing filter with a high flow element traps contaminants before they reach the rails and comes complete with fittings and clamps for neat routing and a straightforward fit on early LS applications.
PTFE Core Stainless Steel Braided Lines for Ethanol Protection
The supply and return hoses feature a smooth PTFE inner core wrapped in a stainless steel braid and protective jacket, providing exceptional resistance to modern ethanol-enhanced fuels and preventing inner wall swelling. This construction stands up to abrasion and chemical attack while shielding nearby wiring and painted surfaces from damage. With a burst rating of 58 psi, the lines maintain consistent flow under heat soak or heavy load, ensuring reliable injector performance. The choice of PTFE and steel braid delivers both chemical compatibility and mechanical strength in a compact assembly.
Return Configuration for Stable 58 PSI Fuel Rail Pressure
Designed specifically for early LS engines equipped with on-rail regulators, the return layout continuously circulates surplus fuel back to the tank to hold rail pressure at a precise 58 psi. This open-loop flow prevents vapor lock under spirited driving or high under-hood temperatures by keeping fuel moving and cool. The direct-fit routing matches OEM mounting points for a neat installation that balances supply and return lines. By moderating pressure spikes, the system preserves consistent spray patterns and injector longevity.
Billet Aluminum Filter and AN Fittings for Clean Installation
The precision-machined aluminum filter housing resists corrosion in demanding engine bay conditions and accepts a replaceable media element that traps contaminants before they reach sensitive injectors. Tool-free element swaps mean routine maintenance takes minutes, reducing downtime and the risk of fuel system blockages. Included two-piece AN fittings and assorted adapters allow secure attachment to early LS rails and tank connections without the need for extra components. Line clamps and mounting hardware complete the kit, delivering a professional-grade assembly that stays vibration-free and neatly routed.
Engineered for precise fit and consistent rail pressure on LS swaps.