400 LPH Fuel Line and Regulator Kit for LS and LT Engines
If you are fitting a 400 LPH pump into an LS or LT swap project, precise and stable fuel pressure is the foremost concern and this Fuel Line and Regulator Kit - 400 LPH answers that need. With PTFE braided lines wrapped in a heat resistant cover, it resists ethanol blends and abrasion under the hood. By using a returnless layout the system avoids extra hoses and minimizes heat soak for reliable flow density. Direct match fittings to late model rails simplify assembly and maintain clean engine bay lines while preserving a 58 psi reference through intake vacuum and manifold boost shifts.
Adaptive Pressure Regulation for LS and LT Engine Swaps
The adjustable regulator in this kit actively monitors intake vacuum and manifold boost to hold a constant 58 psi reference across all operating conditions. By sensing positive and negative pressure shifts, it prevents lean spikes during sudden throttle openings or boost events, ensuring consistent injector spray patterns. Builders can fine tune fuel pressure for naturally aspirated or forced induction LS and LT powertrains without additional adapters. Precision machine tolerances guarantee rapid response under load changes, improving throttle feel and reducing the risk of detonation in high demand applications.
PTFE Stainless Steel Braided Fuel Lines for Ethanol Blend Durability
Each fuel line combines a pure PTFE core with a stainless steel braid covered by a heat and abrasion resistant jacket. This construction delivers exceptionally low permeability to combat vapor lock and material swelling when using ethanol blends. Leakproof fittings at every joint secure high pressure operation and prevent seepage over time. The protective cover shields surrounding wiring and paint from chafe, maintaining a pristine engine bay even in track or off-road environments.
Returnless Layout Reduces Heat Soak and Simplifies Plumbing
The returnless design sends fuel directly from the pump to the regulator, eliminating the need for a separate return line. Fewer hoses and connections mean fewer potential leak points and a cleaner engine compartment that aligns with late model rail styling. Shorter feed paths lower heat soak in the fuel, preserving density and preventing vapor lock during extended operation. Installers benefit from screw-together fittings and line clamps that mate directly to LS and LT rails without costly custom work, cutting assembly time.
Precision Machined Corrosion Resistant Components for Lasting Reliability
All critical parts are manufactured in the USA from corrosion resistant materials and precision machined to tight tolerances. The regulator housing withstands harsh pump gasoline and environmental exposure to deliver steady performance mile after mile. Included stainless steel fittings seal under high pressure while remaining easy to service for filter or line changes. Comprehensive hardware and AN style connectors ensure a secure, shop-ready installation that holds up under street or track conditions.
Depend on precise pressure control and durable materials for reliable operation and for the same kit at a smaller capacity of 255 LPH see our Fuel Line and Regulator Kit - 255 LPH.