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  1. Lethal Performance 99-04 Mustang Stock Hat Fuel Line Upgrade Kit
    $349.99

    99-04 Mustang Stock Hat Fuel Line Upgrade Kit

    Lethal Performance is now offering a stock hat to stock Fuel Rail upgrade kit. This kit is for those looking to extend the range of the stock fuel system in order to support more power. . For those using the Factory Fuel Hat, this kit will mate up to the existing hat while running new -8AN Fuel Line all the way up to the stock Fuel Rails, giving you the added fuel delivery. It's been proven to lower fuel pump duty cycle when adding a larger feed line.

    Kit Includes;

    • 1 X Lethal Performance Stock Hat to Aftermarket Line Adapter
    • 1 X Fragola -8AN Union Fitting
    • 3 X Fragola -8AN Straight -8AN Fitting
    • 1 X Fragola -8AN 45 Degree Fitting
    • 15 Feet -8AN Pushlock Hose
    • 1 X Lethal Performance -8AN to Stock Rail Adapter
    • 1 X Fore Precision Works 10 Micron Fuel Filter
    • 2 X Fittings for Fuel Filter
    • Misc. Clamps and Screws
    Learn More
  2. Lethal Performance Budget Plus Return System to Full Return System Upgrade Kit
    $549.99

    This upgrade kit is for those running the Budget Plus 99-04 4V fuel system who are looking to upgrade to our full return style fuel system with fuel rails. All of the necessary components needed to do so are included in this upgrade kit.

    Upgrade Kit Includes:
    DivisionX 4V Fuel Rails
    DivisionX 2-into-1 Y-Block
    Fragola PTFE Pre-Assembled Fuel Hoses
    XRP Fuel Fittings
    Learn More
  3. Lethal Performance 99-04 Mustang PTFE Line Upgrade Kit for 850-1400rwhp Complete Fuel Systems
    $649.99

    Already have one of the Lethal Performance 850-1400 rwhp fuel systems on your 99-04 Mustang and want to upgrade from the standard push-lock hose to the PTFE hoses? Well then this kit is for you! This kit comes with all the lines and fittings needed to replace the push-lock hose and fittings on your car, and it's already completely assembled, just run the lines and thread them onto the current AN fittings at the hat, filter, regulator and rails. This is the only hose kit that guarantees no fuel smell to weep from the lines and fittings.

    Learn More
  4. Lethal Performance 99-01 Cobra / 03-04 Mach-1 Fuel Line Upgrade w/Fuel Rails
    $699.99

    Lethal Performance 99-01 Cobra / 03-04 Mach-1 Fuel Line Upgrade w/Fuel Rails

    Lethal Performance is proud to offer our own fuel line upgrade kit with fuel rails. This kit is not for the everyday Mustang enthusiast, but for those who are seeking that extra Horsepower but can't seem to find a way to supply the Fuel. For those using the Factory Fuel Hat, this kit will mate up to the existing hat and adapt to a set of DivisionX fuel rails, giving you the added fuel delivery.

    Kit Includes;

    • 1 X Lethal Performance Stock Hat to Aftermarket Line Adapter
    • 3 X Fragola -8AN Straight -8AN Hose Fitting
    • 2 X Fragola -8AN 90 Degree -8AN Hose Fitting
    • 1 X Fragola -8AN 45 Degree Fitting
    • 1 X XRP Low Profile -8AN O ring / -8AN Male Flare
    • 17 Feet -8AN Pushlock Hose (15 ft for feed, 2 ft for crossover
    • 1 X DivisionX Fuel Rails (Black or Clear)
    • 1 X DivisionX 90 degree FRPS Adapter (Black or Clear)
    • 1 X Fuel Rail Fitting Pack
    • 1 X DivisionX 10 Micron Fuel Filter
    • 2 X Fittings for Fuel Filter
    • Misc. Clamps and Screws
    Learn More
  5. Lethal Performance 99-04 Mustang PTFE RETURN Line Upgrade Kit for SN95 Budget Return Fuel Systems
    $159.99

    Already have one of the Lethal Performance SN95 budget return fuel systems on your 99-04 Mustang and want to upgrade from the standard push-lock RETURN hose to the PTFE RETURN hose? Well then this kit is for you! This kit comes withthe lines and fittings needed to replace the push-lock return line hose and fittings on your car, and it's already completely assembled, just run the lines and thread them onto the current AN fittings at the hat and regulator. This is the only hose kit that guarantees no fuel smell to weep from the lines and fittings.

    Learn More
  6. Lethal Performance 99-04 Mustang Stock Hat Fuel Line Upgrade Kit (PTFE Hose)
    $479.99

    99-04 Mustang Stock Hat Fuel Line Upgrade Kit

    Lethal Performance is now offering a stock hat to stock Fuel Rail upgrade kit. This kit is for those looking to extend the range of the stock fuel system in order to support more power. . For those using the Factory Fuel Hat, this kit will mate up to the existing hat while running new -8AN Fuel Line all the way up to the stock Fuel Rails, giving you the added fuel delivery. It's been proven to lower fuel pump duty cycle when adding a larger feed line.

    Kit Includes;

    • 1 X Lethal Performance Stock Hat to Aftermarket Line Adapter
    • 1 X Fragola -8AN Union Fitting
    • 3 X Fragola -8AN Straight -8AN Fitting
    • 1 X Fragola -8AN 45 Degree Fitting
    • 15 Feet -8AN Pushlock Hose
    • 1 X Lethal Performance -8AN to Stock Rail Adapter
    • 1 X Fore Precision Works 10 Micron Fuel Filter
    • 2 X Fittings for Fuel Filter
    • Misc. Clamps and Screws
    Learn More
  7. Lethal Performance 99-04 Mustang Stock Hat to -8an Adapter Fitting
    $24.99

    Want to add a -8an feed line to your Mustang but still using the stock hat and pump assembly? This fitting is perfect for that job! It's a 2 piece fitting that uses a threaded collar to secure and seal it tightly to the stock 3/8" outlet on the stock hat assembly and features a -8an male flare for the outlet. This is the same fitting we use in our Lethal Performance feed line upgrade kits. Learn More
  8. Lethal Performance 99-04 Mustang DivisionX Fuel Hat to Stock Fuel Rails Line Upgrade Kit (PTFE Hose)
    $499.99

    Lethal Performance 99-04 Mustang DivisionX Fuel Hat to Stock Fuel Rails Line Upgrade Kit (PTFE Hose) 

    Lethal Performance is now offering a DivisionX fuel hat to stock Fuel Rail upgrade kit with PTFE hose and fittings. This kit is for those looking to extend the range of the stock fuel system in order to support more power. For those using the DivisionX DX-SN016 fuel hat, this kit will mate up to the existing hat while running new -8AN PTFE Fuel Line all the way up to the stock Fuel Rails, giving you the added fuel delivery. It's been proven to lower fuel pump duty cycle when adding a larger feed line.

    Kit Includes;

    • 1 X -10 O-Ring x -8an Male Flare Fitting
    • 1 X Fragola -8AN ORB/-8an Male Flare Fitting
    • 3 X Fragola -8AN Straight PTFE Fittings
    • 1 X Fragola -8AN 45 Degree PTFE Fitting
    • 15 Feet -8AN PTFE Hose
    • 1 X Lethal Performance -8AN to Stock Rail Adapter
    • 1 X DivisionX 10 Micron Fuel Filter
    • 2 X Fittings for Fuel Filter
    • Misc. Clamps and Screws
    Learn More
  9. Lethal Performance 99-04 Mustang DivisionX Fuel Hat to Stock Fuel Rails Fuel Line Upgrade Kit
    $349.99

    Lethal Performance 99-04 Mustang DivisionX Fuel Hat to Stock Fuel Rails Fuel Line Upgrade Kit

    Lethal Performance is now offering a DivisionX fuel hat to stock Fuel Rail upgrade kit. This kit is for those looking to extend the range of the stock fuel system in order to support more power. . For those using the DivisionX Fuel Hat, this kit will mate up to the existing hat while running new -8AN Fuel Line all the way up to the stock Fuel Rails, giving you the added fuel delivery. It's been proven to lower fuel pump duty cycle when adding a larger feed line.

    Kit Includes;

    • 1 X FPS-495104-BL -10an O-Ring x -8an Male Flare
    • 3 X FPS-200108-BL Fragola -8AN Straight -8AN Fitting
    • 1 X FPS-204508-BL Fragola -8AN 45 Degree Fitting
    • 15 Feet FPS-800008 -8AN Pushlock Hose
    • 1 X LP-8ANRAILADAPTER Lethal Performance -8AN to Stock Rail Adapter
    • 1 X DX-0010M DivisionX 10 Micron Fuel Filter
    • 2 X FPS-495104-BL Fittings for Fuel Filter
    • Misc. Clamps and Screws

    NOTE: This system comes standard with push-lock fuel hose which CAN weep a bit of fuel smell. We have used this hose in several of our shop cars with both gasoline and E85 with excellent results and no fuel smell, but some customer have noticed a smell and Fragola has acknowledged this. If you decide to purchase this kit with the standard hose Lethal Performance will not be liable for claims of fuel smell after installation. To avoid any chances of this smell, it is recommend top purchase the line upgrade kit that uses PTFE fuel hose elsewhere in this section.

    Learn More

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