Performance Fuel System Parts for LS Swaps, EFI Conversions & High-Performance Builds

At Hot Rod AN, we specialize in premium AN hose and fuel system solutions designed to meet the demands of LS engine swaps, EFI conversions, and custom high-performance builds. Whether you're working on a 1973–87 C10, K10, or Blazer, upgrading a classic carbureted truck, or building from scratch, we have the parts, bundles, and tools to help you plumb it right the first time.

Fuel Line Kits and Hose Bundles

Our pre-built AN hose and fitting bundles take the guesswork out of fuel plumbing. Available in a range of lengths, colors, and AN sizes, these kits use high-quality PTFE-lined hose for maximum fuel compatibility, zero vapor smell, and superior pressure handling. Choose nylon braided or stainless steel braided hose depending on your desired look and protection level. Each bundle includes a mix of straight, 45°, and 90° PTFE hose ends to cover common routing challenges in your engine bay or along the frame rails.

LS Engine Swap Fuel Line Kits

For customers doing an LS swap, we offer complete fuel line kits tailored for both return-style and return-less setups. These kits include PTFE hose, AN fittings, mounting clamps, EFI quick-connects, and—depending on the version—a Corvette-style filter/regulator or fittings to integrate with your existing pressure system. Designed specifically for GM LS platforms, these kits eliminate confusion and help ensure clean, reliable plumbing from tank to rail.

PTFE Hose End Fittings

We carry a full selection of reusable PTFE hose end fittings to complete or expand your custom plumbing project. From straight and 90° to hard-to-find 120° and 180° fittings, our inventory supports everything from tight bends around frame rails to vertical drops behind engines. Each fitting is precision-machined, tested for seal integrity, and designed to pair with our PTFE-lined hose.

AN Adapter Fittings

Building a custom fuel system often means adapting between various thread types. That’s why we stock a wide range of AN to NPT, ORB, metric, and hardline adapter fittings. These components are essential for integrating fuel pumps, regulators, EFI throttle bodies, factory fuel rails, and sending units into your AN-based system. Whether you’re dealing with OEM fuel filter threads or converting a GM fuel sender to AN-6, we have the specialty fittings you need to make the connection.

Fuel Filters

Don’t let a clogged or poorly sized filter choke your system. We offer multiple options, including OEM-style inline metal canister filters, billet aluminum filters with serviceable elements, and compact units that integrate into tight spaces. Most filters are 10-micron or 5-micron rated to protect modern EFI injectors and maintain steady fuel pressure. These are ideal for LS swaps and high-performance EFI applications where filtration is critical.

Fuel Pressure Regulators

Controlling fuel pressure is vital for system reliability. We provide both traditional return-style regulators and Corvette-style filter/regulator combo units. These are perfect for LS swaps using a single-line feed or throttle-body EFI systems that rely on steady 58 PSI fuel pressure. Our regulators are compatible with AN fittings, and several models are available with built-in AN ports for clean installation.

Fuel Pumps – In-Tank and Inline

From daily driver EFI setups to 700+ HP builds, we offer fuel pump options to match. Choose from in-tank models like Walbro, Aeromotive, and Spectra, or inline external pumps for retrofit applications. Each pump is selected for reliability, compatibility with modern fuels, and ease of integration with our AN plumbing components. Whether you're mounting inside an EFI-ready tank or upgrading your existing tank with an external pump, we've got the right flow rate and fittings.

Fuel Sending Units & EFI Retrofit Hangers

If you’re reusing or upgrading your factory tank, a proper sending unit is crucial for EFI success. We offer a full lineup of 1987-style and retrofit sending units for Squarebody pickups and Blazers, with provisions for in-tank EFI pumps and dual line plumbing. These sending units can be adapted to AN hose using our hardline-to-AN adapter kits, allowing you to upgrade without fabricating custom hardware. Perfect for single or dual tank trucks.

AN Hose Installation Tools

Installing PTFE AN hose is easier—and cleaner—when you have the right tools. Our selection includes hose cutting shears, aluminum AN wrenches, vise jaw inserts, and complete tool bundles. These tools help you achieve professional-grade results at home, avoiding fraying, galling, or leaks due to improper assembly. If you’re building your system from scratch, these tools are a must-have.

Hose Mounting Hardware

Routing AN hose securely is just as important as selecting the right fittings. Our clamps, brackets, and mounting hardware are designed for clean installs along your frame rails, under your cab, or through your engine bay. Available in multiple sizes to match -6 AN and -8 AN hose, these clamps prevent abrasion, keep things tidy, and make future maintenance easier. Choose from rubber-lined clamps, aluminum mounts, and other hardware options to match your install style.

Built to Fuel Your Build

Every product we carry is tested and curated with LS swaps, EFI conversions, and high-horsepower builds in mind. We don't just sell hose—we engineer fuel systems. Whether you're plumbing a single-tank return-style layout or building a full dual-tank EFI solution in a Squarebody truck, our products and guides are here to support your project from start to finish.

Not Sure What You Need?

Check out our Ultimate Fuel System Guide for 1973–1987 Squarebody LS swaps in the blog section for a complete walkthrough. Or visit the build request page to have our team help spec out a complete system with hose, fittings, pumps, filters, and everything else you'll need. We’re here to help you build a fuel system that works flawlessly—on the street, track, or trail.