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Fuel Line and Regulator Kit - 400 LPH


Fuel Line and Regulator Kit - 400 LPH
Purchase Fuel Line and Regulator Kit - 400 LPH
  • Fuel Line and Regulator Kit - 400 LPH

  • $795.00

    SKU: 6605-00

58 psi Returnless 400 LPH Fuel Line for LS & LT Engines

Engineered for unwavering 58 psi regulation on LS and LT rails under boost, the Fuel Line and Regulator Kit tames lean spikes and optimizes flow for your 400 LPH pump. Constructed in the USA from corrosion resistant materials with an adjustable regulator that integrates a vacuum and boost port plus PTFE braided line and protective jacket, it simplifies plumbing, cuts heat soak and delivers OE spec performance you can count on.

Fuel Line and Regulator Kit for LS and LT Engine Swaps

When it comes to swapping an LS or LT engine, precise fuel pressure control for a 400 LPH pump is non negotiable. The Fuel Line and Regulator Kit - 400 LPH maintains a 58 psi reference under varying intake vacuum and manifold boost to eliminate lean spikes. It uses a returnless layout with PTFE braided lines in a heat resistant cover to reduce heat soak and withstand ethanol blends along with under hood abrasion. Direct match fittings to late model rails keep installation simple and engine bays tidy without custom adapters.

Adaptive Vacuum and Boost Referenced Pressure Control

The adjustable regulator draws on both intake vacuum and manifold boost to keep fuel pressure at a constant 58 psi reference through all operating conditions. By sensing negative and positive pressure shifts, the unit prevents lean spikes during sudden throttle openings or boost events, ensuring consistent spray patterns and stable combustion. This capability can be fine tuned for naturally aspirated LS and LT engines as well as turbo and supercharger setups, offering versatility across a broad range of powertrains. Its design follows late model rail specifications so builders can avoid complex custom fabrication. Precision machine tolerances maintain reliable response even under rapid load changes.

PTFE and Stainless Steel Braided Fuel Line Structure

Each line features a core of pure PTFE wrapped in a stainless steel braid and covered by a protective black jacket that resists heat and abrasion. This combination yields exceptionally low permeability to reduce vapor loss, a key advantage when using ethanol blends that can cause material swelling. Leakproof fittings at every joint deliver secure connections and eliminate the risk of seepage under pressure. The cover also shields surrounding paint and wiring harnesses from chafe during engine movement or track use. As a result, the feed path remains both durable and safe in demanding environments.

Returnless Layout for Efficient Installation

The returnless layout sends fuel directly from the pump into the regulator, removing the need for a separate return line and simplifying plumbing. Fewer hoses and fittings mean fewer potential leak points and a cleaner engine bay appearance that meets OE style expectations. By reducing the length of the feed path, the design lowers heat soak in the fuel, preserving density and preventing vapor lock during extended operation. Assembly is accelerated by screw together fittings and line clamps that match LS and LT rails without extra adapters. The result is a streamlined installation that cuts labor time and enhances reliability.

Corrosion Resistant Regulator and Fitting Components

All critical parts are manufactured in the USA from corrosion resistant materials and precision machined to tight tolerances. The regulator housing stands up to harsh pump gasoline and environmental conditions to deliver consistent performance mile after mile. Included fittings are crafted from stainless steel and engineered to seal under high pressure while remaining easy to assemble and disassemble for service. A rapid flow fuel filter protects the rail and injectors by capturing debris before it can cause damage. Combined with assorted AN style connectors, line clamps, and mounting hardware, this kit provides long term reliability for street or track use.

Count on MuscleRods for lasting performance and see our Fuel Line and Regulator Kit - 255 LPH for the same kit but at a smaller capacity of 255 LPH.

Specifications

  • SKU: 6605-00
  • Swap Engine: LS, LT
  • Brand: Muscle Rods
  • Material: High-Quality P.T.F.E. Stainless Steel Braided
  • What's Included:
    • Adjustable fuel pressure regulator with vacuum/boost reference port
    • PTFE stainless-steel braided fuel line (black-jacketed) for return-less systems
    • High-flow fuel filter
    • Two-piece screw-together fitting for the LS/LT fuel rail
    • Assorted AN-style fittings & connectors to plumb tank-to-rail
    • Line clamps and mounting hardware

Key Features

  • Adjustable regulator with vacuum/boost port
  • PTFE braided fuel line with black protective jacket
  • Return-less design for LS/LT rails
  • Made in the USA with corrosion-resistant materials

Benefits

  • Fine-tunes pressure for 400 LPH pumps and holds steady under boost, preventing lean spikes
  • Resists ethanol, heat, and abrasion while safeguarding paint and wiring
  • Simplifies plumbing, reduces heat-soak, and meets OE 58-psi spec
  • Consistent build quality and long-term reliability

This Item Assigned to Category and Also Fits:

Description

Fuel Line and Regulator Kit for LS and LT Engine Swaps

When it comes to swapping an LS or LT engine, precise fuel pressure control for a 400 LPH pump is non negotiable. The Fuel Line and Regulator Kit - 400 LPH maintains a 58 psi reference under varying intake vacuum and manifold boost to eliminate lean spikes. It uses a returnless layout with PTFE braided lines in a heat resistant cover to reduce heat soak and withstand ethanol blends along with under hood abrasion. Direct match fittings to late model rails keep installation simple and engine bays tidy without custom adapters.

Adaptive Vacuum and Boost Referenced Pressure Control

The adjustable regulator draws on both intake vacuum and manifold boost to keep fuel pressure at a constant 58 psi reference through all operating conditions. By sensing negative and positive pressure shifts, the unit prevents lean spikes during sudden throttle openings or boost events, ensuring consistent spray patterns and stable combustion. This capability can be fine tuned for naturally aspirated LS and LT engines as well as turbo and supercharger setups, offering versatility across a broad range of powertrains. Its design follows late model rail specifications so builders can avoid complex custom fabrication. Precision machine tolerances maintain reliable response even under rapid load changes.

PTFE and Stainless Steel Braided Fuel Line Structure

Each line features a core of pure PTFE wrapped in a stainless steel braid and covered by a protective black jacket that resists heat and abrasion. This combination yields exceptionally low permeability to reduce vapor loss, a key advantage when using ethanol blends that can cause material swelling. Leakproof fittings at every joint deliver secure connections and eliminate the risk of seepage under pressure. The cover also shields surrounding paint and wiring harnesses from chafe during engine movement or track use. As a result, the feed path remains both durable and safe in demanding environments.

Returnless Layout for Efficient Installation

The returnless layout sends fuel directly from the pump into the regulator, removing the need for a separate return line and simplifying plumbing. Fewer hoses and fittings mean fewer potential leak points and a cleaner engine bay appearance that meets OE style expectations. By reducing the length of the feed path, the design lowers heat soak in the fuel, preserving density and preventing vapor lock during extended operation. Assembly is accelerated by screw together fittings and line clamps that match LS and LT rails without extra adapters. The result is a streamlined installation that cuts labor time and enhances reliability.

Corrosion Resistant Regulator and Fitting Components

All critical parts are manufactured in the USA from corrosion resistant materials and precision machined to tight tolerances. The regulator housing stands up to harsh pump gasoline and environmental conditions to deliver consistent performance mile after mile. Included fittings are crafted from stainless steel and engineered to seal under high pressure while remaining easy to assemble and disassemble for service. A rapid flow fuel filter protects the rail and injectors by capturing debris before it can cause damage. Combined with assorted AN style connectors, line clamps, and mounting hardware, this kit provides long term reliability for street or track use.

Count on MuscleRods for lasting performance and see our Fuel Line and Regulator Kit - 255 LPH for the same kit but at a smaller capacity of 255 LPH.

Features
  • Adjustable regulator with vacuum/boost port
  • PTFE braided fuel line with black protective jacket
  • Return-less design for LS/LT rails
  • Made in the USA with corrosion-resistant materials
Benefits
  • Fine-tunes pressure for 400 LPH pumps and holds steady under boost, preventing lean spikes
  • Resists ethanol, heat, and abrasion while safeguarding paint and wiring
  • Simplifies plumbing, reduces heat-soak, and meets OE 58-psi spec
  • Consistent build quality and long-term reliability
What's Included
  • Adjustable fuel pressure regulator with vacuum/boost reference port
  • PTFE stainless-steel braided fuel line (black-jacketed) for return-less systems
  • High-flow fuel filter
  • Two-piece screw-together fitting for the LS/LT fuel rail
  • Assorted AN-style fittings & connectors to plumb tank-to-rail
  • Line clamps and mounting hardware
Specifications
  • SKU: 6605-00
  • Brand: Muscle Rods
  • Swap Engine: LS, LT
  • Material: High-Quality P.T.F.E. Stainless Steel Braided
In Category