GM LS non return fuel system plumbing kit with Walbro fuel pump, hoses, and connectors on a white background
LS swap returnless fuel line kit with labeled fittings and technical specifications on a white background
Walbro 255 LS fuel system setup including hoses, fittings, and filters labeled on a white background
GM LS non return fuel system plumbing kit with Walbro fuel pump, hoses, and connectors on a white background
LS swap returnless fuel line kit with labeled fittings and technical specifications on a white background
Walbro 255 LS fuel system setup including hoses, fittings, and filters labeled on a white background

GM LS Non-Return Style Fuel System Plumbing Kit

SKU: WA01019

$585.99
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This GM LS Non-Return Style Fuel System Plumbing Kit is a simplified, professional grade solution for LS-swapped buggies, rock crawlers, and Ultra4 cars. Designed specifically for factory style returnless fuel rails, this kit regulates pressure at the tank, eliminating the need for a return line from the engine bay.

The system is built for extreme off-road reliability using a Walbro 255 LPH fuel pump and premium Fragola -6 AN nylon race hose and fittings. By utilizing an integrated filter/regulator assembly, the kit maintains consistent fuel pressure while simplifying plumbing and reducing clutter at the engine.

Included Components:

  • (6) -6 AN Straight Fittings
  • (3) -6 AN 90° Fittings
  • (1) 3/8" Quick Disconnect to -6 AN Straight
  • (1) 3/8" Quick Disconnect to -6 AN 90°
  • (1) 5/16" Quick Disconnect to -6 AN
  • (1) 3/8" Female to -6 AN Fitting
  • (1) Filter/Regulator Assembly (Returnless Style)
  • (1) Walbro 255 LPH Fuel Pump with Sleeve & Clamps
  • (2) Pump Fittings to -6 AN
  • (20 ft) -6 AN Premium Nylon Race Hose
Specifications
  • Fuel System Type: Non-Return (Returnless Rail)
  • Application: GM LS Engines
  • Hose Size: -6 AN
  • Hose Length: 20 Feet
  • Fuel Pump Flow Rating: 255 Liters Per Hour
  • Regulator Style: Filter/Regulator Combination Unit
  • Fittings: Fragola Performance
  • Hose Type: Premium Nylon Race Hose
Fitment
  • Designed for GM LS engines using non-return (returnless) fuel rails
  • Ideal for:
    • LS swaps
    • Tube chassis rock crawlers
    • Ultra4 and race builds
    • Custom off-road rigs

Not intended for traditional return-style LS fuel systems without modification.

Tech Insight

This GM LS Non-Return Style Fuel System is centered around a reliable Walbro 255 LPH pump and engineered to provide stable fuel pressure for naturally aspirated LS engines and moderate performance applications.

By pairing a filter/regulator unit and flexible -6 AN hose, the kit offers:

 

  • Simplified Routing: Drastically reduces engine bay plumbing, which is ideal for tight mid- or rear-engine buggy chassis.
  • Off-Road Durability: Proven to withstand the extreme vibration and abuse of rock crawling and racing.
  • Cleaner Packaging: Maintains high flow capacity while keeping the layout organized and easy to maintain

Works well with
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