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SPEEDFX 575115B Dual Inlet Fuel Line Kit for Holley 4150 Carburetors

Manufacturer

SPEEDFX

<h3>About SPEEDFX</h3><p>When it comes to keeping your vehicle's fuel system running cleanly and efficiently, the quality of every component matters — from the largest fuel storage solution to the smallest fitting. <strong>SPEEDFX</strong> is a dedicated fuel system parts manufacturer offering a focused lineup of components designed to move, filter, and contain fuel reliably across a wide range of vehicle applications.</p><p>SPEEDFX has built its reputation by concentrating on what matters most in fuel delivery: precision engineering, material durability, and consistent fitment. Their catalog spans the essential components that make up a complete fuel system, making them a practical one-stop source for technicians and DIY enthusiasts tackling fuel system repairs or upgrades.</p><h3>Fuel Delivery Components</h3><p>At the core of the SPEEDFX lineup are their <a href="/11204-speedfx-fuel-feed-line-49965">fuel feed lines</a> and <a href="/11204-speedfx-fuel-line-11224">fuel lines</a> — the critical conduits that carry fuel from the tank to the engine. These lines are engineered to withstand the chemical demands of modern fuel blends, including ethanol-blended fuels, while maintaining flexibility and resistance to cracking under heat and pressure cycling. Choosing the right fuel line for your application ensures consistent fuel delivery and helps prevent potentially dangerous leaks.</p><h3>Fuel Filtration</h3><p>SPEEDFX also offers a broad selection of <a href="/11204-speedfx-fuel-filter-6200">fuel filters</a>, with seven products spanning multiple vehicle fitments. A properly functioning fuel filter protects injectors and carburetors from contaminants that can cause rough running, poor fuel economy, and long-term damage. Regular fuel filter replacement is one of the most cost-effective maintenance steps any vehicle owner can take, and SPEEDFX's range makes it straightforward to find the right fit.</p><h3>Fittings &amp; Connections</h3><p>Rounding out the fuel system picture, SPEEDFX stocks an extensive selection of <a href="/11204-speedfx-flare-fitting-17445">flare fittings</a> — eleven products covering a variety of thread sizes and configurations. Flare fittings provide leak-resistant, pressure-rated connections in fuel and brake line applications, and having the right fitting on hand can make the difference between a clean repair and a recurring problem.</p><h3>Fuel Storage</h3><p>Beyond in-vehicle fuel system components, SPEEDFX carries a <a href="/11204-speedfx-fuel-storage-can-14584">fuel storage can</a> in their lineup, rounding out their fuel-focused product ecosystem for both on- and off-vehicle needs.</p><p>Whether you're a professional technician maintaining a shop inventory or a home mechanic sourcing parts for a specific repair, SPEEDFX provides reliable, well-matched fuel system components across the categories that matter most.</p>

Part Number

575115B
09/13/2036 9:48 PM
Sale Price

$67.37

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The SPEEDFX 575115B is a premium dual inlet fuel line kit designed specifically for Holley Dual Feed 4150 series carburetors (except 4010/4011 models). This complete assembly provides a professional solution for converting your carburetor fuel inlet to -8AN fittings.

Key Features:

  • -8AN male to 1/2 inch NPT port configuration for secure fuel delivery
  • Black anodized aluminum fittings for corrosion resistance and a sleek appearance
  • Stainless steel braided hose construction for durability and resistance to fuel degradation
  • Dual inlet design supports high-performance fuel system requirements
  • Direct fit for Holley 4150 dual feed carburetors (excludes 4010 and 4011 models)

This fuel line assembly is ideal for performance engine builds and race applications where reliable, leak-free fuel delivery is critical. The braided stainless construction withstands high fuel pressures while the anodized finish resists corrosion from ethanol-blended fuels.

Products specifications

Outlet Attachment Type

Male Threads

Prop 65 - Short Label

WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov

Prop 65 Y/N

Y

Finish

Anodized

Inlet Attachment Type

Male Threads

Color

Black

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I ordered a specific product, that was advertised, and then received a cancellation notice, and refund, due to the products unavailability. Then, another similar product was sent in its place, that has the same part #. But it isn`t the same, using it. I actually have contacted the manufacturer about them selling their own different product under the same part #. And they have replied saying that the formula for it hasn`t changed, even though the packaging has. But I have the older version and the new version, of their product, and the new, isn`t as effective. I have since re-sent more specific`s on it, and am waiting their reply.

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